index | title | code | Difficulty |
---|---|---|---|
1 | A + B Problem | JavaScript | Easy |
2 | Trailing Zeros | JavaScript | Easy |
3 | Digit Counts | Medium | |
4 | Ugly Number II | JavaScript | Medium |
5 | Kth Largest Element | Medium | |
6 | Merge Two Sorted Arrays | JavaScript | Easy |
7 | Serialize and Deserialize Binary Tree | Python | Medium |
8 | Rotate String | Python | Easy |
9 | Fizz Buzz | JavaScript | Easy |
10 | String Permutation II | Medium | |
11 | Search Range in Binary Search Tree | Python | Medium |
12 | Min Stack | Python | Medium |
13 | Implement strStr() | Easy | |
14 | First Position of Target | JavaScript | Easy |
15 | Permutations | Python | Medium |
16 | Permutations II | Python | Medium |
17 | Subsets | Python | Medium |
18 | Subsets II | Python | Medium |
20 | Dices Sum | Python | Hard |
21 | Moving Circle | Medium | |
22 | Flatten List | Python | Easy |
24 | LFU Cache | Python | Hard |
26 | inner product | Hard | |
27 | abc String | Hard | |
28 | Search a 2D Matrix | JavaScript | Easy |
29 | Interleaving String | Medium | |
30 | Insert Interval | Medium | |
31 | Partition Array | Medium | |
32 | Minimum Window Substring | Python | Medium |
33 | N-Queens | Medium | |
34 | N-Queens II | Medium | |
35 | Reverse Linked List | JavaScript | Easy |
36 | Reverse Linked List II | JavaScript | Medium |
37 | Reverse 3-digit Integer | JavaScript | Naive |
38 | Search a 2D Matrix II | JavaScript | Medium |
39 | Recover Rotated Sorted Array | JavaScript | Easy |
40 | Implement Queue by Two Stacks | Python | Medium |
41 | Maximum Subarray | JavaScript | Easy |
42 | Maximum Subarray II | Python | Medium |
43 | Maximum Subarray III | JavaScript | Hard |
44 | Minimum Subarray | Python | Easy |
45 | Maximum Subarray Difference | JavaScript | Medium |
46 | Majority Element | Python | Easy |
47 | Majority Element II | Python | Medium |
48 | Majority Number III | JavaScript | Medium |
49 | Sort Letters by Case | Python | Medium |
50 | Product of Array Exclude Itself | Python | Easy |
51 | Previous Permutation | Medium | |
52 | Next Permutation | Medium | |
53 | Reverse Words in a String | Python | Easy |
55 | Compare Strings | JavaScript | Easy |
56 | Two Sum | JavaScript | Easy |
57 | 3Sum | Python | Medium |
58 | 4Sum | JavaScript Python | Medium |
59 | 3Sum Closest | JavaScript | Medium |
60 | Search Insert Position | JavaScript | Easy |
61 | Search for a Range | JavaScript | Medium |
62 | Search in Rotated Sorted Array | JavaScript | Medium |
63 | Search in Rotated Sorted Array II | JavaScript | Medium |
64 | Merge Sorted Array | Python | Easy |
65 | Median of two Sorted Arrays | Hard | |
66 | Binary Tree Preorder Traversal | JavaScript | Easy |
67 | Binary Tree Inorder Traversal | JavaScript | Easy |
68 | Binary Tree Postorder Traversal | JavaScript | Easy |
69 | Binary Tree Level Order Traversal | JavaScript | Easy |
70 | Binary Tree Level Order Traversal II | Python | Medium |
71 | Binary Tree Zigzag Level Order Traversal | JavaScript | Medium |
72 | Construct Binary Tree from Inorder and Postorder Traversal | JavaScript | Medium |
73 | Construct Binary Tree from Preorder and Inorder Traversal | JavaScript | Medium |
74 | First Bad Version | Python | Medium |
75 | Find Peak Element | Python | Medium |
76 | Longest Increasing Subsequence | JavaScript | Medium |
77 | Longest Common Subsequence | JavaScript | Medium |
78 | Longest Common Prefix | Medium | |
79 | Longest Common Substring | JavaScript | Medium |
80 | Median | Easy | |
81 | Find Median from Data Stream | Hard | |
82 | Single Number | JavaScript | Easy |
83 | Single Number II | JavaScript | Medium |
84 | Single Number III | Python | Medium |
85 | Insert Node in a Binary Search Tree | Python | Easy |
86 | Binary Search Tree Iterator | Python | Hard |
87 | Remove Node in Binary Search Tree | Python | Hard |
88 | Lowest Common Ancestor of a Binary Tree | Python | Medium |
89 | k Sum | Hard | |
90 | k Sum II | Python | Medium |
91 | Minimum Adjustment Cost | Medium | |
92 | Backpack | JavaScript | Medium |
93 | Balanced Binary Tree | JavaScript | Easy |
94 | Binary Tree Maximum Path Sum | JavaScript | Medium |
95 | Validate Binary Search Tree | JavaScript | Medium |
96 | Partition List | JavaScript | Easy |
97 | Maximum Depth of Binary Tree | JavaScript | Easy |
98 | Sort List | Python | Medium |
99 | Reorder List | Python | Medium |
100 | Remove Duplicates from Sorted Array | Python | Easy |
101 | Remove Duplicates from Sorted Array II | Python | Easy |
102 | Linked List Cycle | Python | Medium |
103 | Linked List Cycle II | Python | Hard |
104 | Merge K Sorted Lists | Python | Medium |
105 | Copy List with Random Pointer | Python | Medium |
106 | Convert Sorted List to Binary Search Tree | Python | Medium |
107 | Word Break | Medium | |
108 | Palindrome Partitioning II | Medium | |
109 | Triangle | JavaScript | Medium |
110 | Minimum Path Sum | JavaScript | Easy |
111 | Climbing Stairs | JavaScript | Easy |
112 | Remove Duplicates from Sorted List | JavaScript | Easy |
113 | Remove Duplicates from Sorted List II | Python | Medium |
114 | Unique Paths | JavaScript | Easy |
115 | Unique Paths II | JavaScript | Easy |
116 | Jump Game | JavaScript | Medium |
117 | Jump Game II | JavaScript | Medium |
118 | Distinct Subsequences | Python | Medium |
119 | Edit Distance | Medium | |
120 | Word Ladder | Hard | |
121 | Word Ladder II | Hard | |
122 | Largest Rectangle in Histogram | Hard | |
123 | Word Search | Medium | |
124 | Longest Consecutive Sequence | Medium | |
125 | Backpack II | JavaScript | Medium |
126 | Max Tree | Hard | |
127 | Topological Sorting | Medium | |
128 | Hash Function | JavaScript | Easy |
129 | Rehashing | Medium | |
130 | Heapify | Python | Medium |
131 | The Skyline Problem | Super | |
132 | Word Search II | Hard | |
133 | Longest Word | Python | Easy |
134 | LRU Cache | Python | Hard |
135 | Combination Sum | Python | Medium |
136 | Palindrome Partitioning | Medium | |
137 | Clone Graph | Medium | |
138 | Subarray Sum | Python | Easy |
139 | Subarray Sum Closest | Medium | |
140 | Fast Power | Python | Medium |
141 | Sqrt(x) | Python | Easy |
142 | O(1) Check Power of 2 | JavaScript | Easy |
143 | Sort Colors II | Medium | |
144 | Interleaving Positive and Negative Numbers | Python | Medium |
145 | Lowercase to Uppercase | JavaScript | Naive |
146 | Lowercase to Uppercase II | Naive | |
147 | Narcissistic Number | Easy | |
148 | Sort Colors | Medium | |
149 | Best Time to Buy and Sell Stock | JavaScript | Medium |
150 | Best Time to Buy and Sell Stock II | JavaScript | Medium |
151 | Best Time to Buy and Sell Stock III | JavaScript | Medium |
152 | Combinations | Python | Medium |
153 | Combination Sum II | Python | Medium |
154 | Regular Expression Matching | Hard | |
155 | Minimum Depth of Binary Tree | JavaScript | Easy |
156 | Merge Intervals | Easy | |
157 | Unique Characters | Python | Easy |
158 | Valid Anagram | JavaScript | Easy |
159 | Find Minimum in Rotated Sorted Array | JavaScript | Medium |
160 | Find Minimum in Rotated Sorted Array II | JavaScript | Medium |
161 | Rotate Image | JavaScript | Medium |
162 | Set Matrix Zeroes | JavaScript | Medium |
163 | Unique Binary Search Trees | JavaScript | Medium |
164 | Unique Binary Search Trees II | Python | Medium |
165 | Merge Two Sorted Lists | JavaScript | Easy |
166 | Nth to Last Node in List | Python | Easy |
167 | Add Two Numbers | JavaScript | Easy |
168 | Burst Balloons | Hard | |
169 | Tower of Hanoi | Medium | |
170 | Rotate List | JavaScript | Medium |
171 | Anagrams | JavaScript | Medium |
172 | Remove Element | Python | Easy |
173 | Insertion Sort List | Python | Easy |
174 | Remove Nth Node From End of List | JavaScript | Easy |
175 | Invert Binary Tree | JavaScript | Easy |
176 | Route Between Two Nodes in Graph | Medium | |
177 | Convert Sorted Array to Binary Search Tree With Minimal Height. | Python | Easy |
178 | Graph Valid Tree | Medium | |
179 | Update Bits | Medium | |
181 | Flip Bits | JavaScript | Easy |
182 | Delete Digits | Medium | |
183 | Wood Cut | Hard | |
184 | Largest Number | Medium | |
185 | Matrix Zigzag Traversal | JavaScript | Easy |
186 | Max Points on a Line | Medium | |
187 | Gas Station | Medium | |
188 | Insert five | Easy | |
189 | First Missing Positive | JavaScript | Medium |
190 | Next Permutation II | Medium | |
191 | Maximum Product Subarray | JavaScript | Medium |
192 | Wildcard Matching | Hard | |
193 | Longest Valid Parentheses | JavaScript | Easy |
194 | Find Words | Medium | |
196 | Missing Number | JavaScript | Medium |
197 | Permutation Index | Medium | |
198 | Permutation Index II | Medium | |
199 | Judge Connection | Medium | |
200 | Longest Palindromic Substring | Medium | |
201 | Segment Tree Build | Python | Medium |
202 | Segment Tree Query | Python | Medium |
203 | Segment Tree Modify | Python | Medium |
204 | Singleton | Python | Easy |
205 | Interval Minimum Number | Python | Medium |
206 | Interval Sum | Python | Medium |
207 | Interval Sum II | Python | Hard |
208 | Assignment Operator Overloading (C++ Only) | Medium | |
209 | First Unique Character in a String | JavaScript | Easy |
210 | Null-terminated String | Easy | |
211 | String Permutation | JavaScript | Easy |
212 | Space Replacement | Python | Easy |
213 | String Compression | JavaScript | Easy |
214 | Max of Array | Naive | |
215 | Rate Limiter | Hard | |
216 | Substring Rotation | Easy | |
217 | Remove Duplicates from Unsorted List | Easy | |
218 | Student Level | Easy | |
219 | Insert Node in Sorted Linked List | Easy | |
221 | Add Two Numbers II | JavaScript | Medium |
222 | Setter and Getter | Naive | |
223 | Palindrome Linked List | JavaScript | Medium |
224 | Implement Three Stacks by Single Array | Medium | |
225 | Find Node in Linked List | Naive | |
226 | Set of Stacks II | Hard | |
227 | Mock Hanoi Tower by Stacks | Easy | |
228 | Middle of Linked List | Naive | |
229 | Stack Sorting | Medium | |
230 | Animal Shelter | Hard | |
231 | Typeahead | Hard | |
232 | Tiny Url | Medium | |
233 | Next Smaller and Larger Number with the Same 1 Bits | Medium | |
234 | Web Crawler | Super | |
235 | Prime Factorization | Easy | |
236 | Swap Bits | Easy | |
237 | Missing Integer | Easy | |
238 | Monochrome Screen | Easy | |
239 | Root of Equation | Easy | |
240 | Program Check | Hard | |
241 | String to Integer | Naive | |
242 | Convert Binary Tree to Linked Lists by Depth | Python | Easy |
243 | Amicable Pair | Easy | |
244 | Delete Char | Medium | |
245 | Subtree | Medium | |
246 | Binary Tree Path Sum II | Medium | |
247 | Segment Tree Query II | Python | Medium |
248 | Count of Smaller Number | JavaScript | Medium |
249 | Count of Smaller Number before itself | JavaScript | Hard |
250 | Special Palindrome String | Easy | |
251 | Array compression | Medium | |
252 | arithmetic matrix | Medium | |
253 | Minimum Type Way | Medium | |
254 | Drop Eggs | Easy | |
255 | Multi-string search | Easy | |
256 | The Maximum Order | Hard | |
257 | Longest String Chain | Medium | |
258 | Map Jump | Hard | |
259 | Find the largest Divisor | Medium | |
260 | Same Diagonal Elements | Easy | |
261 | Maximum Connected Area | Medium | |
262 | heir tree | Medium | |
264 | Counting Universal Subarrays | Easy | |
265 | Maximum Non-Negative Subarray | Easy | |
266 | Expect Distance | Medium | |
267 | minimum rest days | Medium | |
268 | Parentheses Score | Medium | |
269 | two colors' tower | Hard | |
270 | Letter Combinations of a Phone Number II | Medium | |
271 | prefix notation to postfix notation | Medium | |
272 | Climbing Stairs II | Easy | |
273 | Test Strategy | Medium | |
274 | Make binary tree average | Super | |
275 | Moving Shed | Medium | |
276 | another zuma | Medium | |
277 | Word Spacing | Easy | |
278 | Paint Fill | JavaScript | Easy |
279 | Number of Ways to Represent N Cents | Medium | |
280 | Closest City | Easy | |
281 | Paint the Ceiling | Medium | |
282 | Decrypt the String | Easy | |
283 | Max of 3 Numbers | JavaScript | Naive |
284 | Matching Subsequences | Medium | |
285 | Tall Building | Medium | |
286 | Inversions | Hard | |
287 | The Competition of View | Medium | |
290 | Sorted Arrangement | Hard | |
291 | Second Diameter | Medium | |
292 | Sort Anagrams Array | Easy | |
293 | The depth of the tunnel | Medium | |
294 | Linked List Simplification | Easy | |
296 | Unique Array | Easy | |
360 | Sliding Window Median | Hard | |
362 | Sliding Window Maximum | JavaScript | Hard |
363 | Trapping Rain Water | Medium | |
364 | Trapping Rain Water II | Hard | |
365 | Count 1 in Binary | Python | Easy |
366 | Fibonacci | JavaScript | Naive |
367 | Expression Tree Build | Hard | |
368 | Expression Evaluation | Hard | |
369 | Convert Expression to Polish Notation | Medium | |
370 | Convert Expression to Reverse Polish Notation | Medium | |
371 | Print Numbers by Recursion | JavaScript | Medium |
372 | Delete Node in a Linked List | Python | Easy |
373 | Partition Array by Odd and Even | Python | Easy |
374 | Spiral Matrix | JavaScript | Medium |
375 | Clone Binary Tree | JavaScript | Easy |
376 | Binary Tree Path Sum | Python | Easy |
378 | Convert Binary Tree to Doubly Linked List | Python | Medium |
379 | Reorder array to construct the minimum number | Medium | |
380 | Intersection of Two Linked Lists | Python | Medium |
381 | Spiral Matrix II | Medium | |
382 | Triangle Count | Medium | |
383 | Container With Most Water | Medium | |
384 | Longest Substring Without Repeating Characters | JavaScript | Medium |
385 | ArrayList | Easy | |
386 | Longest Substring with At Most K Distinct Characters | Medium | |
387 | The Smallest Difference | JavaScript | Medium |
388 | Permutation Sequence | Medium | |
389 | Valid Sudoku | Easy | |
390 | Find Peak Element II | Hard | |
391 | Number of Airplanes in the Sky | Medium | |
392 | House Robber | JavaScript | Medium |
393 | Best Time to Buy and Sell Stock IV | JavaScript | Medium |
394 | Coins in a Line | Medium | |
395 | Coins in a Line II | Medium | |
396 | Coins in a Line III | Hard | |
397 | Longest Continuous Increasing Subsequence | JavaScript | Easy |
398 | Longest Continuous Increasing Subsequence II | Hard | |
399 | Nuts & Bolts Problem | Medium | |
400 | Maximum Gap | Medium | |
401 | Kth Smallest Number in Sorted Matrix | JavaScript | Medium |
402 | Continuous Subarray Sum | JavaScript | Medium |
403 | Continuous Subarray Sum II | Medium | |
404 | Subarray Sum II | Medium | |
405 | Submatrix Sum | Medium | |
406 | Minimum Size Subarray Sum | JavaScript | Medium |
407 | Plus One | JavaScript | Easy |
408 | Add Binary | JavaScript | Easy |
411 | Gray Code | Medium | |
412 | Candy | Medium | |
413 | Reverse Integer | JavaScript | Easy |
414 | Divide Two Integers | Medium | |
415 | Valid Palindrome | JavaScript | Medium |
417 | Valid Number | Easy | |
418 | Integer to Roman | JavaScript | Medium |
419 | Roman to Integer | JavaScript | Medium |
420 | Count and Say | Easy | |
421 | Simplify Path | Medium | |
422 | Length of Last Word | JavaScript | Easy |
423 | Valid Parentheses | JavaScript | Easy |
424 | Evaluate Reverse Polish Notation | Python | Medium |
425 | Letter Combinations of a Phone Number | JavaScript | Medium |
426 | Restore IP Addresses | JavaScript | Medium |
427 | Generate Parentheses | JavaScript | Medium |
428 | Pow(x, n) | Python | Medium |
430 | Scramble String | Hard | |
431 | Connected Component in Undirected Graph | Medium | |
432 | Find the Weak Connected Component in the Directed Graph | Medium | |
433 | Number of Islands | JavaScript | Easy |
434 | Number of Islands II | Medium | |
435 | Post Office Problem | Hard | |
436 | Maximal Square | JavaScript | Medium |
437 | Copy Books | Medium | |
438 | Copy Books II | Hard | |
439 | Segment Tree Build II | Python | Medium |
440 | Backpack III | Medium | |
442 | Implement Trie (Prefix Tree) | Python | Medium |
443 | Two Sum - Greater than target | Medium | |
445 | Cosine Similarity | Python | Easy |
447 | Search in a Big Sorted Array | Medium | |
448 | Inorder Successor in BST | Python | Medium |
449 | Char to Integer | Naive | |
450 | Reverse Nodes in k-Group | JavaScript | Hard |
451 | Swap Nodes in Pairs | JavaScript | Easy |
452 | Remove Linked List Elements | JavaScript | Easy |
453 | Flatten Binary Tree to Linked List | JavaScript | Easy |
454 | Rectangle Area | Python | Naive |
455 | Student ID | Easy | |
456 | Reference | Naive | |
457 | Classical Binary Search | Python | Easy |
458 | Last Position of Target | Easy | |
459 | Closest Number in Sorted Array | Easy | |
460 | Find K Closest Elements | JavaScript | Medium |
461 | Kth Smallest Numbers in Unsorted Array | Medium | |
462 | Total Occurrence of Target | Easy | |
463 | Sort Integers | JavaScript | Naive |
464 | Sort Integers II | JavaScript | Easy |
465 | Kth Smallest Sum In Two Sorted Arrays | Hard | |
466 | Count Linked List Nodes | JavaScript | Naive |
467 | Complete Binary Tree | Easy | |
468 | Symmetric Binary Tree | Easy | |
469 | Same Tree | JavaScript | Easy |
470 | Tweaked Identical Binary Tree | Easy | |
471 | Top K Frequent Words | JavaScript | Medium |
472 | Binary Tree Path Sum III | Hard | |
473 | Add and Search Word - Data structure design | Medium | |
474 | Lowest Common Ancestor II | Python | Easy |
475 | Binary Tree Maximum Path Sum II | Medium | |
476 | Stone Game | JavaScript | Medium |
477 | Surrounded Regions | Python | Medium |
478 | Simple Calculator | Naive | |
479 | Second Max of Array | JavaScript | Easy |
480 | Binary Tree Paths | JavaScript | Easy |
481 | Binary Tree Leaf Sum | Easy | |
482 | Binary Tree Level Sum | Easy | |
483 | Convert Linked List to Array List | Naive | |
484 | Swap Two Integers in Array | JavaScript | Naive |
485 | Generate ArrayList with Given Size | Naive | |
486 | Merge K Sorted Arrays | JavaScript | Medium |
487 | Name Deduplication | Easy | |
488 | Happy Number | JavaScript | Easy |
489 | Convert Array List to Linked List | Easy | |
490 | Set of Stacks | Easy | |
491 | Palindrome Number | JavaScript | Easy |
492 | Implement Queue by Linked List | Easy | |
493 | Implement Queue by Linked List II | Easy | |
494 | Implement Stack by Two Queues | Easy | |
495 | Implement Stack | Python | Easy |
496 | Toy Factory | Python | Easy |
497 | Shape Factory | Easy | |
498 | Parking Lot | Hard | |
499 | Word Count (Map Reduce) | Medium | |
500 | Inverted Index | Medium | |
501 | Design Twitter | Medium | |
502 | Mini Cassandra | Medium | |
503 | Anagram (Map Reduce) | Medium | |
504 | Inverted Index (Map Reduce) | Medium | |
505 | Web Logger | Medium | |
506 | Movie Recommendation | Easy | |
507 | Wiggle Sort II | Hard | |
508 | Wiggle Sort | Medium | |
509 | Mini Yelp | Hard | |
510 | Maximal Rectangle | Hard | |
511 | Swap Two Nodes in Linked List | JavaScript | Medium |
512 | Decode Ways | JavaScript | Medium |
513 | Perfect Squares | JavaScript | Medium |
514 | Paint Fence | Easy | |
515 | Paint House | Medium | |
516 | Paint House II | Hard | |
517 | Ugly Number | JavaScript | Easy |
518 | Super Ugly Number | JavaScript | Medium |
519 | Consistent Hashing | Easy | |
520 | Consistent Hashing II | Medium | |
521 | Remove Duplicate Numbers in Array | Easy | |
522 | Tiny Url II | Medium | |
523 | Url Parser | Medium | |
524 | Left Pad | Python | Easy |
525 | Mini Uber | Medium | |
526 | Load Balancer | Medium | |
527 | Trie Serialization | Hard | |
528 | Flatten Nested List Iterator | Python | Medium |
529 | Geohash | Medium | |
530 | Geohash II | Medium | |
531 | Six Degrees | Medium | |
532 | Reverse Pairs | JavaScript | Medium |
533 | Two Sum - Closest to target | Medium | |
534 | House Robber II | JavaScript | Medium |
535 | House Robber III | Medium | |
537 | N-Gram (Map Reduce) | Medium | |
538 | Memcache | Medium | |
539 | Move Zeroes | JavaScript | Easy |
540 | Zigzag Iterator | Python | Medium |
541 | Zigzag Iterator II | Medium | |
543 | Kth Largest in N Arrays | Hard | |
544 | Top k Largest Numbers | Medium | |
545 | Top k Largest Numbers II | Medium | |
546 | Implement Queue by Interface | Easy | |
547 | Intersection of Two Arrays | Python | Easy |
548 | Intersection of Two Arrays II | JavaScript | Medium |
549 | Top K Frequent Words (Map Reduce) | Medium | |
550 | Top K Frequent Words II | Hard | |
551 | Nested List Weight Sum | Python | Easy |
552 | Create Maximum Number | Hard | |
553 | Bomb Enemy | Medium | |
554 | Sort Integers (Map Reduce) | Medium | |
555 | Counting Bloom Filter | Medium | |
556 | Standard Bloom Filter | Medium | |
557 | Count Characters | Easy | |
558 | Sliding Window Matrix Maximum | Hard | |
559 | Trie Service | Medium | |
560 | Friendship Service | Easy | |
562 | Backpack IV | JavaScript | Medium |
563 | Backpack V | JavaScript | Medium |
564 | Combination Sum IV | JavaScript | Medium |
565 | Heart Beat | Medium | |
566 | GFS Client | Medium | |
569 | Add Digits | JavaScript | Easy |
570 | Find the Missing Number II | Medium | |
573 | Build Post Office II | Hard | |
574 | Build Post Office | Medium | |
575 | Decode String | Medium | |
577 | Merge K Sorted Interval Lists | Medium | |
578 | Lowest Common Ancestor III | Python | Medium |
581 | Longest Repeating Subsequence | Medium | |
582 | Word Break II | Hard | |
584 | Drop Eggs II | Medium | |
585 | Maximum Number in Mountain Sequence | JavaScript | Medium |
586 | Sqrt(x) II | Medium | |
587 | Two Sum - Unique pairs | Medium | |
588 | Partition Equal Subset Sum | JavaScript | Medium |
589 | Connecting Graph | Medium | |
590 | Connecting Graph II | Medium | |
591 | Connecting Graph III | Medium | |
593 | Stone Game II | Medium | |
594 | strStr II | Hard | |
595 | Binary Tree Longest Consecutive Sequence | JavaScript | Easy |
596 | Minimum Subtree | Easy | |
597 | Subtree with Maximum Average | Easy | |
598 | Zombie in Matrix | Medium | |
599 | Insert into a Cyclic Sorted List | Medium | |
600 | Smallest Rectangle Enclosing Black Pixels | Hard | |
601 | Flatten 2D Vector | Python | Medium |
602 | Russian Doll Envelopes | Hard | |
603 | Largest Divisible Subset | Medium | |
604 | Window Sum | JavaScript | Easy |
605 | Sequence Reconstruction | Medium | |
606 | Kth Largest Element II | Medium | |
607 | Two Sum III - Data structure design | Python | Easy |
608 | Two Sum II - Input array is sorted | JavaScript | Medium |
609 | Two Sum - Less than or equal to target | Medium | |
610 | Two Sum - Difference equals to target | Medium | |
611 | Knight Shortest Path | Medium | |
612 | K Closest Points | Medium | |
613 | High Five | Medium | |
614 | Binary Tree Longest Consecutive Sequence II | JavaScript | Medium |
615 | Course Schedule | Medium | |
616 | Course Schedule II | Medium | |
617 | Maximum Average Subarray II | Medium | |
618 | Search Graph Nodes | Medium | |
619 | Binary Tree Longest Consecutive Sequence III | Medium | |
620 | Maximum Subarray IV | Medium | |
621 | Maximum Subarray V | Hard | |
622 | Frog Jump | Hard | |
623 | K Edit Distance | Hard | |
624 | Remove Substrings | Medium | |
625 | Partition Array II | Medium | |
626 | Rectangle Overlap | Easy | |
627 | Longest Palindrome | JavaScript | Easy |
628 | Maximum Subtree | Easy | |
629 | Minimum Spanning Tree | Hard | |
630 | Knight Shortest Path II | Medium | |
631 | Maximal Square II | Medium | |
632 | Binary Tree Maximum Node | Python | Naive |
633 | Find the Duplicate Number | JavaScript | Hard |
634 | Word Squares | Hard | |
635 | Boggle Game | Hard | |
636 | 132 Pattern | Medium | |
637 | Valid Word Abbreviation | JavaScript | Easy |
638 | Isomorphic Strings | JavaScript | Easy |
639 | Word Abbreviation | Hard | |
640 | One Edit Distance | Medium | |
641 | Missing Ranges | Medium | |
642 | Moving Average from Data Stream | Python | Easy |
643 | Longest Absolute File Path | Medium | |
644 | Strobogrammatic Number | JavaScript | Easy |
645 | Find the Celebrity | Medium | |
646 | First Position Unique Character | JavaScript | Easy |
647 | Find All Anagrams in a String | JavaScript | Easy |
648 | Unique Word Abbreviation | Python | Medium |
649 | Binary Tree Upside Down | JavaScript | Medium |
650 | Find Leaves of Binary Tree | Python | Medium |
651 | Binary Tree Vertical Order Traversal | JavaScript | Medium |
652 | Factorization | Medium | |
653 | Expression Add Operators | Hard | |
654 | Sparse Matrix Multiplication | Medium | |
655 | Add Strings | JavaScript | Easy |
656 | Multiply Strings | Medium | |
657 | Insert Delete GetRandom O(1) | Medium | |
658 | Swap Without Extra Variable (Only C++) | Easy | |
659 | Encode and Decode Strings | Python | Medium |
660 | Read N Characters Given Read4 II - Call multiple times | Hard | |
661 | Convert BST to Greater Tree | JavaScript | Easy |
662 | Guess Number Higher or Lower | Python | Easy |
663 | Walls and Gates | Medium | |
664 | Counting Bits | JavaScript | Medium |
665 | Range Sum Query 2D - Immutable | Python | Medium |
666 | Guess Number Higher or Lower II | Medium | |
667 | Longest Palindromic Subsequence | Medium | |
668 | Ones and Zeroes | Medium | |
669 | Coin Change | JavaScript | Medium |
670 | Predict the Winner | JavaScript | Medium |
671 | Rotate Words | Python | Easy |
676 | Decode Ways II | Hard | |
677 | Number of Big Islands | Medium | |
678 | Shortest Palindrome | Medium | |
679 | Unique Paths III | Hard | |
680 | Split String | Python | Medium |
681 | First Missing Prime Number | Medium | |
683 | Word Break III | Medium | |
684 | Missing String | JavaScript | Easy |
685 | First Unique Number in Data Stream | JavaScript | Medium |
686 | Remove Arbitrary Space | JavaScript | Easy |
688 | The Number In Words | Medium | |
689 | Two Sum IV - Input is a BST | Python | Medium |
690 | Factorial | Hard | |
691 | Recover Binary Search Tree | JavaScript | Medium |
692 | Sliding Window Unique Elements Sum | JavaScript | Medium |
693 | Remove Dights | Easy | |
696 | Course Schedule III | Hard | |
697 | Sum of Square Numbers | JavaScript | Easy |
698 | Maximum Distance in Arrays | Medium | |
699 | Check Sum of K Primes | Hard | |
700 | Cutting a Rod | JavaScript | Medium |
701 | Trim a Binary Search Tree | JavaScript | Medium |
702 | Concatenated String with Uncommon Characters of Two Strings | JavaScript | Easy |
703 | Folding Array | Hard | |
704 | Bulb Switcher II | Medium | |
706 | Binary Watch | Medium | |
707 | Optimal Account Balancing | Super | |
708 | Elevator system - OO Design | Hard | |
709 | Restaurant OO Design | Hard | |
710 | Hotel OO Design | Hard | |
712 | Vending machine OO Design | Hard | |
714 | Black Jack OO Design | Medium | |
717 | Tree Longest Path With Same Value | Medium | |
718 | Repeat String | Medium | |
719 | Calculate Maximum Value | Medium | |
720 | Rearrange a String With Integers | JavaScript | Easy |
721 | Next Sparse Number | Hard | |
722 | Maximum Subarray VI | Super | |
723 | Rotate Bits - Left | Medium | |
724 | Minimum Partition | Medium | |
725 | Boolean Parenthesization | Hard | |
726 | Check Full Binary Tree | JavaScript | Medium |
727 | Chinese Remainder Theorem | Hard | |
728 | Three Distinct Factors | Medium | |
729 | Last Digit By Factorial Divide | Medium | |
730 | Sum of All Subsets | JavaScript | Easy |
731 | Restaurant II OO Design | Hard | |
732 | Hotel II OO Design | Hard | |
734 | Number of Subsequences of Form a^i b^j c^k | Medium | |
735 | Replace With Greatest From Right | Python | Medium |
737 | Find Elements in Matrix | JavaScript | Easy |
738 | Count Different Palindromic Subsequences | Hard | |
739 | 24 Game | Hard | |
740 | Coin Change 2 | JavaScript | Medium |
741 | Calculate Maximum Value II | Medium | |
742 | Self Dividing Numbers | Medium | |
743 | Monotone Increasing Digits | Medium | |
744 | Sum of first K even-length Palindrome numbers | Medium | |
745 | Palindromic Ranges | Medium | |
746 | Design Tic-Tac-Toe | Hard | |
747 | Coffee Maker OO Design | Medium | |
748 | Kindle OO Design | Medium | |
749 | John's backyard garden | JavaScript | Easy |
750 | Portal | Medium | |
751 | John's business | Medium | |
752 | Rogue Knight Sven | Medium | |
756 | Multiply Two Numbers | JavaScript | Easy |
757 | Shortest Unordered Array | Easy | |
759 | Time Angle | JavaScript | Easy |
760 | Binary Tree Right Side View | JavaScript | Medium |
761 | Smallest Subset | JavaScript | Medium |
762 | Longest Common Subsequence II | Hard | |
763 | Hex Conversion | JavaScript | Easy |
764 | Calculate Circumference And Area | Python | Easy |
765 | Valid Triangle | JavaScript | Easy |
766 | Leap Year | JavaScript | Easy |
767 | Reverse Array | JavaScript | Easy |
768 | Yang Hui Triangle | JavaScript | Easy |
769 | Spiral Array | JavaScript | Easy |
770 | Maximum and Minimum | JavaScript | Easy |
771 | Double Factorial | Easy | |
772 | Group Anagrams | Medium | |
773 | Vlid Anagram | JavaScript | Easy |
774 | Repeated DNA | JavaScript | Medium |
775 | Palindrome Pairs | Hard | |
776 | Strobogrammatic Number II | Medium | |
777 | Valid Perfect Square | JavaScript | Easy |
778 | Pacific Atlantic Water Flow | Python | Medium |
779 | Generalized Abbreviation | Medium | |
780 | Remove Invalid Parentheses | Hard | |
782 | AND and OR | Medium | |
783 | Minimum Risk Path | Hard | |
784 | The Longest Common Prefix II | Easy | |
785 | Maximum Weighted Sum Path | JavaScript | Medium |
786 | Linked List Weighted Sum In Reverse Order | Easy | |
787 | The Maze | Medium | |
788 | The Maze II | Medium | |
789 | The Maze III | Hard | |
790 | Parser | Medium | |
791 | Merge Number | JavaScript | Medium |
792 | Kth Prime Number | Easy | |
793 | Intersection of Arrays | Medium | |
794 | Sliding Puzzle II | Hard | |
795 | 4-Way Unique Paths | Hard | |
796 | Open the Lock | Hard | |
797 | Reach a Number | Easy | |
798 | Backpack VII | Medium | |
799 | Backpack VIII | Medium | |
800 | Backpack IX | JavaScript | Medium |
801 | Backpack X | Medium | |
802 | Sudoku Solver | Hard | |
803 | Shortest Distance from All Buildings | Hard | |
804 | Number of Distinct Islands II | Hard | |
805 | Maximum Association Set | Medium | |
806 | Buy Fruits | Medium | |
807 | Palindrome Number II | Easy | |
808 | Movie Network | Medium | |
809 | K-th Symbol in Grammar | Medium | |
810 | Swim in Rising Water | Hard | |
811 | Swap Adjacent in LR String | Medium | |
812 | Bold Words in String | Easy | |
813 | Find Anagram Mappings | JavaScript | Easy |
814 | Shortest Path in Undirected Graph | Medium | |
815 | Course Schedule IV | Hard | |
816 | Traveling Salesman Problem | Hard | |
817 | Range Sum Query 2D - Mutable | Medium | |
818 | Subset With Target | Hard | |
819 | Word Sorting | Medium | |
820 | Rectangle | Medium | |
821 | Time Intersection | Medium | |
822 | Reverse Order Storage | JavaScript | Easy |
823 | Input Stream | JavaScript | Easy |
824 | Single Number IV | JavaScript | Medium |
825 | Bus Station | Hard | |
826 | Computer Maintenance | Hard | |
828 | Word Pattern | JavaScript | Easy |
829 | Word Pattern II | Hard | |
830 | String Sort | Easy | |
831 | 3Sum II | Medium | |
832 | Count Negative Number | Medium | |
833 | Process Sequence | Medium | |
834 | Remove Duplicate Letters | Easy | |
835 | Hamming Distance | JavaScript | Easy |
836 | Partition to K Equal Sum Subsets | Hard | |
837 | Palindromic Substrings | JavaScript | Easy |
838 | Subarray Sum Equals K | JavaScript | Easy |
839 | Merge Two Sorted Interval Lists | Easy | |
840 | Range Sum Query - Mutable | Python | Medium |
841 | String Replace | Hard | |
842 | Origami | Medium | |
843 | Digital Flip | JavaScript | Medium |
844 | Number Pair Statistics | Easy | |
845 | Greatest Common Divisor | JavaScript | Easy |
846 | Multi-keyword Sort | JavaScript | Easy |
848 | Minimize Max Distance to Gas Station | Hard | |
849 | Basic Calculator III | Hard | |
851 | Pour Water | Medium | |
852 | IP to CIDR | Easy | |
853 | Number Of Corner Rectangles | Medium | |
854 | Closest Leaf in a Binary Tree | JavaScript | Medium |
855 | Sentence Similarity II | Medium | |
856 | Sentence Similarity | JavaScript | Easy |
857 | Minimum Window Subsequence | Hard | |
858 | Candy Crush | Medium | |
859 | Max Stack | Python | Hard |
860 | Number of Distinct Islands | Medium | |
861 | K Empty Slots | Hard | |
862 | Next Closest Time | Medium | |
863 | Binary Tree Path Sum IV | Medium | |
864 | Equal Tree Partition | JavaScript | Medium |
865 | Remove 9 | Hard | |
866 | Coin Path | Hard | |
867 | 4 Keys Keyboard | Medium | |
868 | Maximum Average Subarray | JavaScript | Easy |
869 | Find the Derangement of An Array | Medium | |
871 | Minimum Factorization | Medium | |
872 | Kill Process | Python | Easy |
873 | Squirrel Simulation | Medium | |
874 | Maximum Vacation Days | Hard | |
875 | Longest Line of Consecutive One in Matrix | JavaScript | Medium |
876 | Split Concatenated Strings | Medium | |
877 | Split Array with Equal Sum | Medium | |
878 | Boundary of Binary Tree | Medium | |
879 | Output Contest Matches | Medium | |
880 | Construct Binary Tree from String | JavaScript | Medium |
881 | Lonely Pixel II | Medium | |
883 | Max Consecutive Ones II | JavaScript | Medium |
884 | Find Permutation | Medium | |
885 | Encode String with Shortest Length | Hard | |
886 | Convex Polygon | Medium | |
887 | Ternary Expression Parser | Medium | |
888 | Valid Word Square | JavaScript | Easy |
889 | Sentence Screen Fitting | Medium | |
890 | Minimum Unique Word Abbreviation | Hard | |
891 | Valid Palindrome II | JavaScript | Medium |
892 | Alien Dictionary | Hard | |
893 | Longest Palindromic Substring II | Hard | |
894 | Pancake Sorting | Medium | |
895 | Friend Request | Easy | |
896 | Prime Product | Medium | |
897 | Island City | Easy | |
898 | Leftmost One | Medium | |
900 | Closest Binary Search Tree Value | JavaScript | Easy |
901 | Closest Binary Search Tree Value II | Hard | |
902 | Kth Smallest Element in a BST | JavaScript | Medium |
903 | Range Addition | Medium | |
904 | Plus One Linked List | JavaScript | Medium |
905 | Nested List Weight Sum II | Medium | |
906 | Sort Transformed Array | JavaScript | Medium |
908 | Line Reflection | JavaScript | Medium |
909 | Android Unlock Patterns | Medium | |
910 | Largest BST Subtree | Medium | |
911 | Maximum Size Subarray Sum Equals k | JavaScript | Medium |
912 | Best Meeting Point | Hard | |
913 | Flip Game II | Medium | |
914 | Flip Game | JavaScript | Easy |
915 | Inorder Predecessor in BST | Medium | |
916 | Palindrome Permutation | JavaScript | Easy |
917 | Palindrome Permutation II | Medium | |
918 | 3Sum Smaller | JavaScript | Medium |
919 | Meeting Rooms II | Medium | |
920 | Meeting Rooms | JavaScript | Easy |
921 | Count Univalue Subtrees | Medium | |
922 | Group Shifted Strings | Medium | |
923 | Strobogrammatic Number III | Hard | |
924 | Shortest Word Distance | JavaScript | Easy |
926 | Shortest Word Distance III | Medium | |
927 | Reverse Words in a String II | JavaScript | Medium |
928 | Longest Substring with At Most Two Distinct Characters | Hard | |
930 | Connected Components in List | Medium | |
931 | Median of K Sorted Arrays | Hard | |
932 | Friends Within Three Jumps | Medium | |
933 | Tuple Multiply | Medium | |
934 | Unlock Problem | Medium | |
935 | Cartesian Product | Medium | |
936 | Capitalizes The First Letter | JavaScript | Easy |
937 | How Many Problem Can I Accept | Medium | |
939 | Binary Tree Kth Floor Node | Medium | |
940 | Maximum Absolute Value | Medium | |
941 | Sliding Puzzle | Hard | |
943 | Range Sum Query - Immutable | Python | Easy |
944 | Maximum Submatrix | Medium | |
945 | Task Scheduler | Medium | |
946 | 233 Matrix | Medium | |
947 | Matrix Power Series | Hard | |
948 | Sequence Count | Super | |
949 | Fibonacci II | Medium | |
950 | Sliding Puzzle III | Hard | |
951 | Rearrange | Easy | |
952 | Digital Problem | Easy | |
953 | The Biggest Score On The Tree | Medium | |
954 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard | |
955 | Implement Queue by Circular Array | Python | Medium |
956 | Data Segmentation | Easy | |
957 | Radar Detection | Easy | |
958 | Palindrome Data Stream | Easy | |
959 | K Spaced Array Sorting | Medium | |
960 | First Unique Number in Data Stream II | Python | Medium |
969 | Longest Repeating Substring | Medium | |
970 | Big Business | Easy | |
971 | Surplus Value Backpack | Hard | |
972 | Deliver The Message | Medium | |
973 | 1-bit and 2-bit Characters | JavaScript | Easy |
974 | 01 Matrix | JavaScript | Medium |
975 | 2 Keys Keyboard | Medium | |
976 | 4Sum II | JavaScript | Medium |
977 | Base 7 | JavaScript | Easy |
978 | Basic Calculator | Medium | |
979 | Additive Number | Medium | |
980 | Basic Calculator II | Medium | |
981 | Basic Calculator IV | Hard | |
982 | Arithmetic Slices | JavaScript | Medium |
983 | Baseball Game | JavaScript | Easy |
984 | Arithmetic Slices II - Subsequence | Hard | |
985 | Can I Win | Hard | |
986 | Battleships in a Board | Python | Medium |
987 | Binary Number with Alternating Bits | JavaScript | Easy |
988 | Arranging Coins | JavaScript | Easy |
989 | Array Nesting | Medium | |
990 | Beautiful Arrangement | Medium | |
991 | Bulb Switcher | Medium | |
992 | Beautiful Arrangement II | Medium | |
993 | Array Partition I | JavaScript | Easy |
994 | Contiguous Array | JavaScript | Medium |
995 | Best Time to Buy and Sell Stock with Cooldown | JavaScript | Medium |
996 | Maximum Slope Straight Line | Medium | |
997 | Print Organization Chart | Medium | |
998 | Construction Queue | Hard | |
1000 | Best Time to Buy and Sell Stock with Transaction Fee | JavaScript | Medium |
1001 | Asteroid Collision | JavaScript | Medium |
1002 | Bus Routes | Medium | |
1003 | Binary Tree Pruning | JavaScript | Easy |
1004 | Largest Sum of Averages | JavaScript | Medium |
1005 | Largest Triangle Area | JavaScript | Easy |
1006 | Subdomain Visit Count | JavaScript | Easy |
1007 | Chalkboard XOR Game | Medium | |
1008 | Expressive Words | Medium | |
1010 | Max Increase to Keep City Skyline | JavaScript | Medium |
1011 | Number of Lines To Write String | JavaScript | Easy |
1012 | Split Array With Same Average | Hard | |
1013 | Unique Morse Code Words | JavaScript | Easy |
1014 | Bricks Falling When Hit | Hard | |
1015 | Find Eventual Safe States | Medium | |
1016 | Minimum Swaps To Make Sequences Increasing | Medium | |
1017 | Similar RGB Color | Easy | |
1018 | Champagne Tower | JavaScript | Medium |
1019 | Smallest Rotation with Highest Score | Hard | |
1020 | All Paths From Source to Target | Medium | |
1021 | Number of Subarrays with Bounded Maximum | Medium | |
1022 | Valid Tic-Tac-Toe State | JavaScript | Medium |
1023 | Preimage Size of Factorial Zeroes Function | Hard | |
1024 | Number of Matching Subsequences | Medium | |
1025 | Custom Sort String | Medium | |
1026 | Domino and Tromino Tiling | Medium | |
1027 | Escape The Ghosts | JavaScript | Medium |
1028 | Rotated Digits | Easy | |
1029 | Cheapest Flights Within K Stops | Medium | |
1030 | K-th Smallest Prime Fraction | Hard | |
1031 | Is Graph Bipartite? | Medium | |
1032 | Letter Case Permutation | JavaScript | Easy |
1033 | Minimum Difference Between BST Nodes | JavaScript | Easy |
1034 | Transform to Chessboard | Hard | |
1035 | Rabbits in Forest | JavaScript | Medium |
1036 | Reach Points | Hard | |
1037 | Global and Local Inversions | Medium | |
1038 | Jewels And Stones | JavaScript | Easy |
1039 | Max Chunks To Make Sorted | Medium | |
1040 | Max Chunks To Make Sorted II | Hard | |
1041 | Reorganize String | Medium | |
1042 | Toeplitz Matrix | JavaScript | Easy |
1043 | Couples Holding Hands | Hard | |
1044 | Largest Plus Sign | Medium | |
1045 | Partition Labels | Medium | |
1046 | Prime Number of Set Bits in Binary Representation | Easy | |
1047 | Special Binary String | Medium | |
1048 | Set Intersection Size At Least Two | Hard | |
1049 | Pyramid Transition Matrix | Medium | |
1050 | Cracking the Safe | Hard | |
1051 | Contain Virus | Hard | |
1052 | Shortest Completing Word | Medium | |
1053 | Largest Number At Least Twice of Others | JavaScript | Easy |
1054 | Min Cost Climbing Stairs | JavaScript | Easy |
1056 | Find Smallest Letter Greater Than Target | JavaScript | Easy |
1057 | Network Delay Time | Medium | |
1058 | Cherry Pickup | Hard | |
1059 | Delete and Earn | JavaScript | Medium |
1060 | Daily Temperatures | Python | Medium |
1061 | Parse Lisp Expression | Hard | |
1062 | Flood Fill | JavaScript | Easy |
1063 | My Calendar III | Hard | |
1064 | My Calendar II | Medium | |
1065 | My Calendar I | Medium | |
1066 | Verify Preorder Serialization of a Binary Tree | JavaScript | Medium |
1067 | Split Linked List in Parts | Medium | |
1068 | Find Pivot Index | JavaScript | Easy |
1069 | Remove Comments | Medium | |
1070 | Accounts Merge | Medium | |
1071 | Longest Word in Dictionary | Easy | |
1072 | Find K-th Smallest Pair Distance | Hard | |
1073 | Maximum Length of Repeated Subarray | Medium | |
1074 | Range Module | Hard | |
1075 | Subarray Product Less Than K | Medium | |
1076 | Minimum ASCII Delete Sum for Two Strings | JavaScript | Medium |
1077 | Falling Squares | Hard | |
1078 | Degree of an Array | Easy | |
1079 | Count Binary Substrings | Easy | |
1080 | Max Area of Island | JavaScript | Easy |
1081 | Stickers to Spell Word | Hard | |
1082 | Employee Importance | Python | Easy |
1083 | Maximum Sum of 3 Non-Overlapping Subarrays | Hard | |
1084 | Knight Probability in Chessboard | Medium | |
1085 | Longest Univalue Path | JavaScript | Easy |
1086 | Repeated String Match | Easy | |
1087 | Redundant Connection II | Hard | |
1088 | Redundant Connection | Medium | |
1089 | Valid Parenthesis String | JavaScript | Medium |
1090 | Map Sum Pairs | Medium | |
1092 | Cut Off Trees for Golf Event | Hard | |
1093 | Number of Longest Increasing Subsequence | JavaScript | Medium |
1094 | Second Minimum Node In a Binary Tree | JavaScript | Easy |
1095 | Maximum Swap | JavaScript | Medium |
1097 | Kth Smallest Number in Multiplication Table | Hard | |
1098 | Path Sum IV | Medium | |
1099 | Non-decreasing Array | JavaScript | Easy |
1100 | Strange Printer | Hard | |
1101 | Maximum Width of Binary Tree | JavaScript | Medium |
1102 | Image Smoother | Easy | |
1103 | Split Array into Consecutive Subsequences | Medium | |
1104 | Judge Route Circle | Easy | |
1105 | Print Binary Tree | JavaScript | Medium |
1106 | Maximum Binary Tree | JavaScript | Easy |
1108 | Find Duplicate Subtrees | Medium | |
1109 | Dota2 Senate | Medium | |
1110 | Replace Words | Medium | |
1111 | Maximum Length of Pair Chain | Medium | |
1112 | Set Mismatch | JavaScript | Easy |
1113 | Solve the Equation | Medium | |
1114 | Shopping Offers | Medium | |
1115 | Average of Levels in Binary Tree | JavaScript | Easy |
1116 | Exclusive Time of Functions | Medium | |
1117 | Smallest Range | Hard | |
1118 | K Inverse Pairs Array | Hard | |
1119 | Maximum Product of Three Numbers | JavaScript | Easy |
1122 | Add One Row to Tree | JavaScript | Medium |
1125 | Jump Pillar | Medium | |
1126 | Merge Two Binary Trees | JavaScript | Easy |
1127 | Add Bold Tag in String | Medium | |
1129 | Smallest Subtree with All the Deepest Nodes | Medium | |
1130 | Magic circle | Hard | |
1131 | The Function in Permutations | Medium | |
1132 | Valid Triangle Number | Medium | |
1133 | Group Buy | Easy | |
1134 | Find Duplicate File in System | Medium | |
1135 | Feature extraction | Easy | |
1136 | High Click Induction Area | Medium | |
1137 | Construct String from Binary Tree | JavaScript | Easy |
1138 | Can Place Flowers | JavaScript | Easy |
1139 | the kth subarray | Hard | |
1141 | The month's days | Easy | |
1142 | Non-negative Integers without Consecutive Ones | Hard | |
1143 | Minimum Index Sum of Two Lists | JavaScript | Easy |
1144 | Range Addition II | Easy | |
1145 | Associated query | Easy | |
1146 | Chess piece rotation | Easy | |
1147 | Work Plan | Medium | |
1148 | Longest Harmonious Subsequence | Easy | |
1149 | Valid Square | JavaScript | Medium |
1150 | Fraction Addition and Subtraction | Medium | |
1151 | Tag Validator | Hard | |
1152 | Erect the Fence | Hard | |
1153 | string sorting | Easy | |
1154 | Attendance Judgment | Easy | |
1156 | Delete Operation for Two Strings | JavaScript | Medium |
1157 | Shortest Unsorted Continuous Subarray | Easy | |
1158 | Plant flowers | Medium | |
1159 | Longest Common Prefix III | Hard | |
1160 | Campus Bikes | Medium | |
1161 | goods transfer | Hard | |
1162 | Out of Boundary Paths | Medium | |
1163 | Distribute Candies | JavaScript | Easy |
1164 | Wiggle Subsequence | Medium | |
1165 | Subtree of Another Tree | JavaScript | Easy |
1166 | Recommended Results are Scattered | Easy | |
1167 | Top three numbers | Medium | |
1168 | array score | Easy | |
1169 | Permutation in String | JavaScript | Medium |
1170 | Reshape the Matrix | JavaScript | Easy |
1171 | Find the Closest Palindrome | Hard | |
1172 | Binary Tree Tilt | JavaScript | Easy |
1173 | Reverse Words in a String III | JavaScript | Easy |
1174 | Next Greater Element III | Medium | |
1175 | Brick Wall | Medium | |
1176 | Optimal Division | Medium | |
1177 | Student Attendance Record II | Hard | |
1178 | Student Attendance Record I | JavaScript | Easy |
1179 | Friend Circles | Medium | |
1180 | Remove Boxes | Hard | |
1181 | Diameter of Binary Tree | JavaScript | Easy |
1182 | Reverse String II | JavaScript | Easy |
1183 | Single Element in a Sorted Array | JavaScript | Medium |
1184 | Minimum Time Difference | JavaScript | Medium |
1185 | Complex Number Multiplication | JavaScript | Medium |
1186 | Encode and Decode TinyURL | Python | Medium |
1187 | K-diff Pairs in an Array | JavaScript | Easy |
1188 | Minimum Absolute Difference in BST | JavaScript | Easy |
1189 | Minesweeper | Python | Medium |
1190 | Longest Word in Dictionary through Deleting | Medium | |
1191 | Longest Uncommon Subsequence II | Medium | |
1192 | Longest Uncommon Subsequence I | Easy | |
1193 | Detect Capital | JavaScript | Easy |
1194 | Super Washing Machines | Hard | |
1195 | Find Largest Value in Each Tree Row | JavaScript | Medium |
1196 | Freedom Trail | Hard | |
1197 | Find Bottom Left Tree Value | JavaScript | Medium |
1198 | Most Frequent Subtree Sum | Medium | |
1199 | Perfect Number | Easy | |
1200 | Relative Ranks | JavaScript | Easy |
1201 | Next Greater Element II | Medium | |
1202 | IPO | Hard | |
1203 | Find Mode in Binary Search Tree | JavaScript | Medium |
1204 | Keyboard Row | JavaScript | Easy |
1205 | Diagonal Traverse | JavaScript | Medium |
1206 | Next Greater Element I | Easy | |
1207 | Teemo Attacking | Medium | |
1208 | Target Sum | JavaScript | Medium |
1209 | Construct the Rectangle | JavaScript | Easy |
1210 | Increasing Subsequences | Medium | |
1211 | Zuma Game | Hard | |
1212 | Max Consecutive Ones | JavaScript | Easy |
1213 | Smallest Good Base | Hard | |
1214 | License Key Formatting | JavaScript | Easy |
1215 | Magical String | Medium | |
1216 | Largest Palindrome Product | Easy | |
1217 | Total Hamming Distance | Medium | |
1218 | Number Complement | JavaScript | Easy |
1219 | Heaters | Easy | |
1220 | Matchsticks to Square | Medium | |
1221 | Concatenated Words | Hard | |
1222 | Validate IP Address | Medium | |
1223 | Unique Substrings in Wraparound String | Medium | |
1224 | Count The Repetitions | Hard | |
1225 | Island Perimeter | Easy | |
1226 | Minimum Moves to Equal Array Elements II | Medium | |
1227 | Repeated Substring Pattern | JavaScript | Easy |
1228 | Poor Pigs | Easy | |
1229 | Circular Array Loop | Medium | |
1230 | Assign Cookies | JavaScript | Easy |
1231 | Minimum Moves to Equal Array Elements | Easy | |
1232 | Minimum Number of Arrows to Burst Balloons | Medium | |
1235 | Serialize and Deserialize BST | Python | Medium |
1236 | Find All Numbers Disappeared in an Array | JavaScript | Easy |
1237 | Number of Boomerangs | JavaScript | Easy |
1238 | Find All Duplicates in an Array | Python | Medium |
1239 | K-th Smallest in Lexicographical Order | Hard | |
1240 | Path Sum III | Easy | |
1241 | Find Right Interval | Medium | |
1242 | Non-overlapping Intervals | Medium | |
1243 | Number of Segments in a String | JavaScript | Easy |
1244 | Minimum Genetic Mutation | Medium | |
1245 | All O`one Data Structure | Hard | |
1246 | Longest Repeating Character Replacement | Medium | |
1247 | Reconstruct Original Digits from English | Medium | |
1248 | Maximum XOR of Two Numbers in an Array | Medium | |
1249 | Strong Password Checker | Hard | |
1250 | Third Maximum Number | JavaScript | Easy |
1251 | Split Array Largest Sum | JavaScript | Hard |
1252 | Queue Reconstruction by Height | Medium | |
1253 | Convert a Number to Hexadecimal | JavaScript | Easy |
1254 | Sum of Left Leaves | JavaScript | Easy |
1255 | Remove K Digits | Medium | |
1256 | Nth Digit | Easy | |
1257 | Evaluate Division | Medium | |
1258 | Beautiful Subarrays | Medium | |
1259 | Integer Replacement | Medium | |
1260 | Rotate Function | Medium | |
1261 | Longest Substring with At Least K Repeating Characters | Medium | |
1262 | UTF-8 Validation | Medium | |
1263 | Is Subsequence | JavaScript | Medium |
1264 | Perfect Rectangle | Hard | |
1265 | Elimination Game | Medium | |
1266 | Find the Difference | JavaScript | Easy |
1267 | Lexicographical Numbers | JavaScript | Medium |
1269 | Handkerchief Throwing | Medium | |
1270 | Ransom Note | JavaScript | Easy |
1271 | Critical Connections in a Network | Hard | |
1272 | Kth Smallest Element in a Sorted Matrix | JavaScript | Medium |
1273 | Maximum Length of Increasing String | Hard | |
1274 | Find K Pairs with Smallest Sums | Medium | |
1275 | Super Pow | JavaScript | Medium |
1276 | Sum of Two Integers | Easy | |
1277 | Water and Jug Problem | Medium | |
1278 | Max Sum of Rectangle No Larger Than K | Hard | |
1279 | Count Numbers with Unique Digits | Medium | |
1280 | Data Stream as Disjoint Intervals | Hard | |
1281 | Top K Frequent Elements | Python | Medium |
1282 | Reverse Vowels of a String | JavaScript | Easy |
1283 | Reverse String | JavaScript | Easy |
1284 | Integer Break | JavaScript | Medium |
1285 | Power of Four | JavaScript | Easy |
1286 | Self Crossing | Hard | |
1287 | Increasing Triplet Subsequence | JavaScript | Medium |
1288 | Reconstruct Itinerary | Medium | |
1289 | Number of Atoms | Hard | |
1290 | Patching Array | Hard | |
1291 | Sports Meeting | Medium | |
1292 | Odd Even Linked List | JavaScript | Medium |
1293 | Count of Range Sum | Hard | |
1294 | Power of Three | JavaScript | Easy |
1295 | Prime Factor Statistics | Easy | |
1296 | Maximum Product of Word Lengths | Medium | |
1297 | Count of Smaller Numbers After Self | Hard | |
1298 | Minimum Height Trees | Medium | |
1299 | Bulls and Cows | Medium | |
1300 | Bash Game | JavaScript | Easy |
1301 | Game of Life | Medium | |
1302 | People Counting | Easy | |
1303 | H-Index II | Medium | |
1304 | H-Index | Medium | |
1305 | Integer to English Words | Medium | |
1306 | Travel Plan II | Hard | |
1307 | Verify Preorder Sequence in Binary Search Tree | JavaScript | Medium |
1308 | Factor Combinations | Medium | |
1309 | Different Ways to Add Parentheses | Medium | |
1310 | Product of Array Except Self | JavaScript | Medium |
1311 | Lowest Common Ancestor of a Binary Search Tree | Python | Easy |
1312 | Number of Digit One | JavaScript | Hard |
1313 | Bipartite Graph | Medium | |
1314 | Power of Two | JavaScript | Easy |
1315 | Summary Ranges | Medium | |
1316 | Luck Number | Hard | |
1317 | Count Complete Tree Nodes | JavaScript | Medium |
1318 | Contains Duplicate III | Medium | |
1319 | Contains Duplicate II | JavaScript | Easy |
1320 | Contains Duplicate | JavaScript | Easy |
1321 | Combination Sum III | Medium | |
1322 | Product Equal B | Hard | |
1323 | Fetch supplies | Medium | |
1324 | Count Primes | JavaScript | Easy |
1325 | Bitwise AND of Numbers Range | Medium | |
1326 | Boarder Sort | Medium | |
1327 | delete string | Easy | |
1328 | Double Change | Easy | |
1329 | Sequence maintenance | Hard | |
1330 | zero matrix | Hard | |
1331 | English Software | Easy | |
1332 | Number of 1 Bits | JavaScript | Easy |
1333 | Reverse Bits | JavaScript Python | Easy |
1334 | Rotate Array | JavaScript | Easy |
1335 | Repeated DNA Sequences | JavaScript | Medium |
1336 | Invite your friend | Medium | |
1337 | Maximum Possible Value | Medium | |
1338 | Parking Dilemma | Easy | |
1339 | Maximum Range | Hard | |
1340 | add character | Easy | |
1341 | Combine New Numbers | Medium | |
1342 | substitute string | Medium | |
1343 | Sum of Two Strings | Python | Easy |
1344 | Counter Diagonal Sort | Medium | |
1345 | Robot Encircular | Medium | |
1346 | Dungeon Game | Hard | |
1347 | Factorial Trailing Zeroes | JavaScript | Easy |
1348 | Excel Sheet Column Number | JavaScript | Easy |
1350 | Excel Sheet Column Title | JavaScript | Easy |
1351 | Fraction to Recurring Decimal | Medium | |
1352 | Compare Version Numbers | JavaScript | Medium |
1353 | Sum Root to Leaf Numbers | JavaScript | Medium |
1354 | Pascal's Triangle II | JavaScript | Easy |
1355 | Pascal's Triangle | JavaScript | Easy |
1356 | Maximum Points Set | Medium | |
1357 | Path Sum II | JavaScript | Medium |
1358 | Path Sum | JavaScript | Easy |
1359 | Convert Sorted Array to Binary Search Tree | JavaScript | Easy |
1360 | Symmetric Tree | JavaScript | Easy |
1361 | Text Justification | Hard | |
1362 | Substring with Concatenation of All Words | Hard | |
1363 | ZigZag Conversion | Medium | |
1364 | the minium distance | Medium | |
1365 | Minimum Cycle Section | Hard | |
1366 | Directed Graph Loop | Medium | |
1367 | Police Distance | Medium | |
1368 | Same Number | JavaScript | Easy |
1369 | Most Common Word | Easy | |
1370 | Race Car | Hard | |
1371 | Linked List Components | JavaScript | Medium |
1372 | Ambiguous Coordinates | Medium | |
1373 | Movies on Flight | Medium | |
1374 | Shortest Distance in 3D Space | Medium | |
1375 | Substring With At Least K Distinct Characters | Medium | |
1376 | Equivalent Strings | Medium | |
1377 | Find Substring | Medium | |
1378 | Minimum String Array Coverage | Medium | |
1379 | The Longest Scene | Hard | |
1380 | Log Sorting | Easy | |
1381 | Maximum Line Coverage | Hard | |
1382 | High Capacity Backpack | Medium | |
1383 | Subtree Count | Hard | |
1384 | Segment Stones Merge | Super | |
1385 | Lucky Number Eight | Easy | |
1386 | Cable Car Ride | Easy | |
1387 | Binary Trees With Factors | Medium | |
1388 | Card Flipping Game | Medium | |
1389 | Shortest Distance to a Character | Easy | |
1390 | Short Encoding of Words | Medium | |
1391 | Making A Large Island | Hard | |
1392 | Most Profit Assigning Work | Medium | |
1393 | Friends Of Appropriate Ages | Medium | |
1394 | Goat Latin | JavaScript | Easy |
1395 | The Barycentre Of The Trees | Hard | |
1396 | Set Union | Medium | |
1397 | Digital Coverage | Medium | |
1398 | K Decimal Addition | Easy | |
1399 | Take Coins | Medium | |
1400 | Fermat Point Of Graphs | Hard | |
1401 | Twitch Words | JavaScript | Easy |
1402 | Recommend Friends | Medium | |
1403 | Maximum Product Path | Medium | |
1408 | Gas Station II | Hard | |
1409 | Matrix Finding Number | Medium | |
1410 | Matrix Water Injection | Easy | |
1411 | Edit Distance - Replace Edition | Medium | |
1412 | Pick Three Numbers | Medium | |
1413 | Tree | Medium | |
1414 | Eat The Beans | Hard | |
1415 | Residual Product | Easy | |
1416 | The Previous Number | Medium | |
1417 | Weighing Problem | Easy | |
1418 | Path With Maximum Minimum Value | Medium | |
1420 | Minimum Window Substring II | Medium | |
1421 | Matrix Game | Easy | |
1422 | Shortest Path Visiting All Nodes | Hard | |
1423 | Hand of Straights | Medium | |
1424 | Longest Mountain in Array | JavaScript | Medium |
1425 | Backspace String Compare | JavaScript | Easy |
1426 | Robot jumping | Hard | |
1427 | Split Array into Fibonacci Sequence | Medium | |
1428 | Keys and Rooms | Medium | |
1430 | Similar String Groups | Hard | |
1431 | Push Dominoes | Medium | |
1432 | New 21 Game | Medium | |
1433 | Image Overlap | Medium | |
1434 | Sum of Distances in Tree | Hard | |
1435 | Find And Replace in String | Medium | |
1436 | Flipping an Image | Easy | |
1437 | Masking Personal Information | Medium | |
1438 | Positions of Large Groups | JavaScript | Easy |
1439 | Consecutive Numbers Sum | Medium | |
1440 | Unique Letter String | Hard | |
1441 | Four Numbers Multiply Problem | Hard | |
1442 | Order Problem | Medium | |
1443 | Longest AB Substring | Easy | |
1444 | Dyeing Problem | Medium | |
1445 | Delete Characters | Easy | |
1446 | 01 Matrix Walking Problem | Medium | |
1447 | Calculation The Sum Of Path | Medium | |
1448 | Card Game | Medium | |
1449 | Loud and Rich | Medium | |
1450 | Rectangle Area II | Hard | |
1451 | Maximize Distance to Closest Person | JavaScript | Easy |
1452 | Shifting Letters | Medium | |
1453 | Minimum Amount | Medium | |
1454 | Word Frequency Count | Medium | |
1455 | Valid Array | Easy | |
1456 | Word Synthesis Problem | Hard | |
1457 | Search Subarray | Medium | |
1458 | Minimum Submatrix | Medium | |
1459 | Judge the last number | Easy | |
1463 | Paper Review | Medium | |
1464 | The K-th Combination | Hard | |
1465 | Order Of Tasks | Medium | |
1466 | Best Shopping Plan | Medium | |
1467 | Ask For Cooling Time | Medium | |
1468 | Two Numbers That Are Not Repeated | Hard | |
1469 | Longest Path On The Tree | Medium | |
1470 | The Game Of Take Numbers | Medium | |
1471 | Set Operation | Easy | |
1472 | Twins Strings | Easy | |
1473 | Find The Sum Of The Array | Medium | |
1474 | Shortest Phrase | Medium | |
1475 | Minimum Legal Bracket Sequence | Hard | |
1476 | Peak Index in a Mountain Array | Easy | |
1477 | Car Fleet | JavaScript | Medium |
1478 | Closest Target Value | Easy | |
1479 | Can Reach The Endpoint | Easy | |
1480 | Dot Product | Easy | |
1481 | Unique Substring | Medium | |
1482 | Minimum Sum Path | Medium | |
1483 | Maximum Average Score | JavaScript | Easy |
1484 | The Most Frequent word | Medium | |
1485 | Holy Grail spell | Python | Easy |
1486 | Function Runtime | Easy | |
1487 | Judging Triangle | Medium | |
1488 | Longest Sequence | Hard | |
1489 | The Largest Sum Of The Matrix Boundary Elements | Medium | |
1490 | K-Similar Strings | Hard | |
1491 | Score of Parentheses | Medium | |
1492 | Koko Eating Bananas | JavaScript | Medium |
1493 | Walking Robot Simulation | Easy | |
1494 | Length of Longest Fibonacci Subsequence | Medium | |
1495 | Leaf-Similar Trees | JavaScript | Easy |
1496 | Implement Rand10() Using Rand7() | Medium | |
1497 | Minimum Number of Refueling Stops | Hard | |
1498 | Advantage Shuffle | Medium | |
1499 | Reordered Power of 2 | JavaScript | Medium |
1500 | Binary Gap | Easy | |
1501 | Transpose Matrix | Easy | |
1502 | Prime Palindrome | Medium | |
1503 | Give change | Easy | |
1504 | Shortest Path to Get All Keys | Hard | |
1505 | Find the Number | Python | Easy |
1506 | All Nodes Distance K in Binary Tree | Python | Medium |
1507 | Shortest Subarray with Sum at Least K | Hard | |
1508 | Score After Flipping Matrix | JavaScript | Medium |
1509 | Lemonade Change | JavaScript | Easy |
1510 | Buddy Strings | JavaScript | Easy |
1511 | Mirror Reflection | Medium | |
1512 | Minimum Cost to Hire K Workers | Hard | |
1513 | Exam Room | Medium | |
1514 | Robot Room Cleaner | Hard | |
1516 | Xor Sum | Super | |
1517 | Largest subarray | JavaScript | Easy |
1518 | Watering Flowers | Medium | |
1519 | Time magic | Python | Easy |
1521 | Unique Twitter User Id Set | Easy | |
1522 | Search in a Sorted Array of Unknown Size | Medium | |
1523 | Partitioning Array | Easy | |
1524 | Search in a Binary Search Tree | JavaScript | Easy |
1525 | N-ary Tree Postorder Traversal | Python | Easy |
1526 | N-ary Tree Preorder Traversal | Python | Easy |
1527 | Majsoul on ! | Medium | |
1528 | number schemes | Hard | |
1529 | Triplet Subarray With Absolute Diff Less Than or Equal to Limit | Hard | |
1530 | Encode N-ary Tree to Binary Tree | Hard | |
1531 | Automatic Proofreading Program | Medium | |
1532 | Serialize and Deserialize N-ary Tree | Hard | |
1533 | N-ary Tree Level Order Traversal | Easy | |
1534 | Convert Binary Search Tree to Sorted Doubly Linked List | Medium | |
1535 | To Lower Case | JavaScript | Easy |
1536 | Find First and Last Position of Element in Sorted Array | JavaScript | Medium |
1537 | Swap Zero-One | Medium | |
1538 | Card Game II | Medium | |
1539 | Flipped the Pixel | Medium | |
1540 | Can Convert | Easy | |
1541 | Put Box | Hard | |
1542 | NextTime Norepeat | Medium | |
1543 | Unique Path IV | Medium | |
1544 | Magic Square | Hard | |
1545 | Last Closest Time | Medium | |
1546 | Coin Problem | Easy | |
1552 | Parking Problem | Medium | |
1553 | Climbing Stairs III | Medium | |
1554 | LastTime Norepeat | Medium | |
1555 | Flower Problem | Hard | |
1556 | Guess Game | Hard | |
1557 | Array Maximum Value | Hard | |
1558 | Interlaced Positive And Negative Numbers | Hard | |
1559 | Take the element and query the sum | Easy | |
1560 | MinimumString | Medium | |
1561 | BST Node Distance | Medium | |
1562 | Number of restaurants | Medium | |
1563 | Shortest path to the destination | Medium | |
1564 | Interval Search | Easy | |
1565 | Modern Ludo I | Easy | |
1566 | Minimum Difference | Hard | |
1567 | Maximum Can Exchanged Subarray | Medium | |
1568 | Poison Test | Medium | |
1569 | Social Network | Medium | |
1570 | Binary Stream | Easy | |
1571 | Top K GPA | Medium | |
1572 | Asking For The Longest 01 Substring | Medium | |
1573 | Legal String | Medium | |
1574 | Music Playlist | Hard | |
1575 | Spring Tour | Easy | |
1576 | Optimal Match | Hard | |
1577 | Sum of leaf nodes | Medium | |
1578 | Number of A | JavaScript | Easy |
1579 | Alphabetic string calculation | Medium | |
1580 | Transition String | Medium | |
1581 | Longest Subsequence | Medium | |
1582 | Minimum Path Sum II | Medium | |
1583 | Maximum Number Sum | Medium | |
1584 | Number Of Xor Values | Medium | |
1585 | Moving Stones | Easy | |
1586 | Minimum Number Of Keystrokes | Medium | |
1587 | String Segmentation | Medium | |
1588 | All Possible Full Binary Trees | Medium | |
1589 | Groups of Special-Equivalent Strings | Easy | |
1590 | Surface Area of 3D Shapes | Easy | |
1591 | Sum of Subsequence Widths | Hard | |
1592 | Find and Replace Pattern | Medium | |
1593 | Construct Binary Tree from Preorder and Postorder Traversal | JavaScript | Medium |
1594 | Fair Candy Swap | JavaScript | Easy |
1596 | Possible Bipartition | Medium | |
1597 | Spiral Matrix III | Medium | |
1598 | Uncommon Words from Two Sentences | JavaScript | Easy |
1599 | Projection Area of 3D Shapes | Easy | |
1600 | Reachable Nodes In Subdivided Graph | Hard | |
1601 | Boats to Save People | JavaScript | Medium |
1602 | Decoded String at Index | Medium | |
1604 | Maximum Sum of Two Numbers | Medium | |
1606 | Strange Sort | Medium | |
1607 | Profitable Schemes | Hard | |
1608 | Nth Magical Number | Hard | |
1609 | Middle of the Linked List | JavaScript | Easy |
1610 | Find the numbers | Medium | |
1611 | Shortest subarray | Medium | |
1612 | Smallest Path | Medium | |
1613 | Highest frequency IP | Naive | |
1614 | Highest growth stock | Easy | |
1615 | The result of investment | Easy | |
1616 | Shortest subarray II | Hard | |
1617 | Array Maximum Difference | Easy | |
1618 | Processing Form | Medium | |
1619 | Candy II | Medium | |
1620 | Collecting Coins | Super | |
1621 | Cut Connection | Easy | |
1623 | Minimal Distance In The Array | Easy | |
1624 | Max Distance | Hard | |
1625 | Words Compression | Hard | |
1626 | Salary Adjustment | Medium | |
1627 | Word Segmentation | Medium | |
1628 | Driving problem | Medium | |
1629 | Find the nearest store | Medium | |
1630 | Interesting String | Medium | |
1631 | Interesting Subarray | Medium | |
1632 | Count email groups | Easy | |
1633 | Strings That Satisfies The Condition | Easy | |
1634 | Secret Word | Medium | |
1635 | Max Pair | Medium | |
1636 | Aerial Movie | Medium | |
1637 | Tree problem | Medium | |
1638 | Least Substring | Easy | |
1639 | K-Substring with K different characters | Medium | |
1640 | Duplicates Digits | Hard | |
1641 | Max Remove Order | Medium | |
1642 | Query String | Medium | |
1643 | Pick Fruits | Medium | |
1644 | Plane Maximum Rectangle | Medium | |
1645 | Least Subsequences | Easy | |
1646 | CheckWords | Medium | |
1647 | Path Search | Medium | |
1648 | max substring | Hard | |
1649 | Super Lollipop | Easy | |
1656 | Legal Number Statistics | JavaScript | Easy |
1657 | Operation Time | Easy | |
1659 | Legal Number Statistics II | Easy | |
1665 | Calculate number | JavaScript | Easy |
1669 | Build a temple | Medium | |
1685 | The mazeIV | Medium | |
1691 | Best Time to Buy and Sell Stock V | Medium | |
1698 | Delete Columns to Make Sorted | Easy | |
1699 | Find the Shortest Superstring | Hard | |
1700 | DI String Match | Easy | |
1701 | Valid Mountain Array | Easy | |
1702 | Distinct Subsequences II | JavaScript | Hard |
1703 | Minimum Area Rectangle | Medium | |
1704 | Range Sum of BST | JavaScript | Medium |
1705 | Compare Strings II | Easy | |
1706 | Stamping The Sequence | Hard | |
1707 | Knight Dialer | Medium | |
1708 | Shortest Bridge | Medium | |
1709 | Number of Recent Calls | Easy | |
1710 | Beautiful Array | Medium | |
1711 | Minimum Falling Path Sum | JavaScript | Medium |
1712 | Binary Subarrays With Sum | Medium | |
1713 | Unique Email Addresses | Easy | |
1714 | Minimize Malware Spread II | Hard | |
1715 | Three Equal Parts | Hard | |
1716 | Flip String to Monotone Increasing | JavaScript | Medium |
1718 | Minimize Malware Spread | Hard | |
1719 | 3Sum With Multiplicity | JavaScript | Medium |
1721 | Minimum Add to Make Parentheses Valid | JavaScript | Medium |
1722 | Number of Music Playlists | Hard | |
1723 | Shortest Path in a Grid with Obstacles Elimination | Medium | |
1724 | Maximum Sum Circular Subarray | JavaScript | Medium |
1725 | Reverse Only Letters | Easy | |
1726 | Word Subsets | Medium | |
1727 | Partition Array into Disjoint Intervals | JavaScript | Medium |
1728 | X of a Kind in a Deck of Cards | Python | Easy |
1729 | Cat and Mouse | Hard | |
1730 | Spreadsheet Notation Conversion | Easy | |
1731 | Smallest Range II | Medium | |
1732 | Snakes and Ladders | Medium | |
1733 | Smallest Range I | Easy | |
1734 | Sum of Subarray Minimums | Medium | |
1736 | Throw garbage | Medium | |
1737 | Fruit Into Baskets | Medium | |
1738 | Valid Permutations for DI Sequence | Hard | |
1739 | Numbers At Most N Given Digit Set | Medium | |
1740 | Online Stock Span | Medium | |
1741 | RLE Iterator | Medium | |
1742 | Orderly Queue | Hard | |
1743 | Bitwise ORs of Subarrays | Medium | |
1744 | Increasing Order Search Tree | JavaScript | Easy |
1745 | Monotonic Array | JavaScript | Easy |
1746 | Minimum Distance Between BST Nodes | JavaScript | Easy |
1747 | Robot Return to Origin | Easy | |
1756 | Buy beverage | Medium | |
1761 | Digital Huarong Road | Hard | |
1767 | Minimum Tree Coverage | Hard | |
1772 | Number of collections | Super | |
1778 | Odd Even Jump | Hard | |
1779 | Shortest Duplicate Subarray | JavaScript | Easy |
1780 | The Candidate With the Most Votes | Medium | |
1781 | Reverse ASCII Encoded Strings | Easy | |
1782 | No Pairs Allowed | Medium | |
1783 | Binary Tree Postorder Traversal-null | JavaScript | Easy |
1784 | Decrease To Be Palindrome | Easy | |
1785 | Bank System | Medium | |
1786 | Pub Sub Pattern | Easy | |
1787 | Google Suggestion (Map Reduce) | Medium | |
1788 | Ascending Binary Sorting | Medium | |
1789 | Distinguish Username | Easy | |
1790 | Rotate String II | Easy | |
1791 | Simple queries | Medium | |
1792 | Cut the sticks | Easy | |
1793 | Balanced Sales Array | Easy | |
1794 | Count Duplicates | Easy | |
1795 | Is Possible | Medium | |
1796 | K-Difference | Medium | |
1797 | optimalUtilization | Easy | |
1798 | Minimum Cost to Merge Stones | Hard | |
1799 | Sequence summation | Easy | |
1800 | Float Combination Sum | Medium | |
1801 | the sum of legal set | Easy | |
1802 | Grid Game | Medium | |
1803 | Rotate beam | Medium | |
1804 | Find The Rank | Easy | |
1807 | Fibonacci easy | Python | Easy |
1808 | Minimum Domino Rotations For Equal Row | Medium | |
1809 | Largest Continguous Subarray | Medium | |
1811 | Find Maximum Gold | Medium | |
1812 | Rotation Number | Easy | |
1814 | Sum of all Subarrays | Python | Easy |
1815 | Threhold Alerts | Easy | |
1816 | Find the Smallest Divisor Given a Threshold | Medium | |
1817 | Divide Chocolate | Hard | |
1819 | Longest Semi Alternating Substring | Easy | |
1820 | Find Letter | Easy | |
1821 | Min Deletions To Obtain String in Right Format | Easy | |
1822 | Minimum Moves | Easy | |
1823 | Longest Prefix of Array | Easy | |
1824 | Most Frequent Substring | Medium | |
1825 | Number Change | Medium | |
1827 | Number of Ways to Stay in the Same Place After Some Steps II | Hard | |
1828 | Lake Escape | Hard | |
1831 | Array Summarization | Easy | |
1832 | Minimum Step | Medium | |
1833 | pen box | Medium | |
1834 | Grouping Options | Hard | |
1835 | Number of Ways to Stay in the Same Place After Some Steps I | Easy | |
1836 | Reaching Point | Medium | |
1840 | Matrix restoration | Medium | |
1844 | subarray sum equals k II | Medium | |
1846 | Reaching Point II | Medium | |
1848 | Word Search III | Hard | |
1849 | Grumpy Bookstore Owner | Medium | |
1850 | Pick Apples | Medium | |
1851 | Buy Passes | Medium | |
1852 | Final Discounted Price | Medium | |
1853 | Efficient Job Processing Service | Hard | |
1854 | Partition Array III | Easy | |
1855 | Reach Destination | Hard | |
1856 | Sub-palindrome | Easy | |
1857 | Find Friend Circle Number | Medium | |
1858 | Set of boxes | Medium | |
1859 | Minimum Amplitude | Easy | |
1860 | the Number of 0-submatrix | Medium | |
1861 | Rat Jump | Hard | |
1862 | Time to Flower Tree | Medium | |
1867 | Most Frequent Word II | Easy | |
1868 | Find the Number of “Balance” in the String | Medium | |
1869 | Count Square Submatrices with All Ones | Medium | |
1870 | number of substrings with all zeroes | Medium | |
1871 | Maximum moment | Easy | |
1872 | Minimum Cost to Connect Sticks | Medium | |
1874 | Kth Smallest Element in a Specific Array | Medium | |
1876 | Alien Dictionary(easy) | Easy | |
1877 | longest super sequence | Medium | |
1878 | Rotated Nums | Easy | |
1879 | Two Sum VII | Hard | |
1880 | Largest Number X Which Occurs X Times | Easy | |
1881 | Aircraft seat | Easy | |
1882 | Fair Indexes | Medium | |
1883 | Top K Frequently Mentioned Keywords | Medium | |
1884 | Take Away The Bottle | Hard | |
1885 | A Strange Sorting Problem | Hard | |
1886 | Moving Target | Easy | |
1887 | Stretch Word | Easy | |
1888 | Shortest Path in Matrix | Medium | |
1889 | Interval Merge | Medium | |
1890 | Form Minimum Number | Medium | |
1891 | Travel Plan | Medium | |
1892 | Mine-sweeping | Medium | |
1893 | the Valid String | Medium | |
1894 | Ad Click Analysis | Easy | |
1895 | Arrange interview city | Easy | |
1896 | Pick Carrots | Easy | |
1897 | Meeting Room III | Medium | |
1899 | Fetch supplies II | Medium | |
1900 | Gene Similarity | Hard | |
1901 | Squares of a Sorted Array | Easy | |
1902 | Find Google | Easy | |
1903 | Department Statistics | Easy | |
1904 | Put small balls | Hard | |
1905 | Character deletion | Easy |
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