recherst / leetcode-algorithm

Leetcode solutions written by Swift. 🔗https://leetcode.com

leetcode-algorithm

Easy

1. Two Sum
2. Palindrome Number
3. Roman to Integer
4. Longest Common Prefix
5. Valid Parentheses
6. Merge Two Sorted Lists
7. Remove Duplicates from Sorted Array
8. Remove Element
9. Implement strStr
10. Search Insert Position
11. Length of Last Word
12. Plus One
13. Add Binary
14. Sqrt(x)
15. Climbing Stairs
16. Remove Duplicates from Sorted List
17. Merge Sorted Array
18. Same Tree
19. Symmetric Tree
20. Maximum Depth of Binary Tree
21. Balanced Binary Tree
22. Convert Sorted Array to Binary Search Tree
23. Minimum Depth of Binary Tree
24. Path Sum
25. Greatest English Letter in Upper and Lower Case
26. Pascal's Triangle
27. Pascal's Triangle II
28. Best Time to Buy and Sell Stock
29. Valid Palindrome
30. Single Number
31. Linked List Cycle
32. Binary Tree Preorder Traversal
33. Binary Tree Inorder Traversal
34. Binary Tree Postorder Traversal
35. Intersection of Two Linked Lists
36. Excel Sheet Column Title
37. Excel Sheet Column Number
38. Majority Element
39. Reverse Bits
40. Number of 1 Bits
41. Happy Number
42. Remove Linked List Elements
43. Isomorphic Strings
44. Reverse Linked List
45. Contains Duplicate
46. Contains Duplicate II
47. Implement Stack using Queues
48. Implement Queue using Stacks
49. Invert Binary Tree
50. Summary Ranges
51. Power of Two
52. Palindrome Linked List
53. Lowest Common Ancestor of a Binary Search Tree
54. Delete Node in a Linked List
55. Valid Anagram
56. Binary Tree Paths
57. Add Digits
58. Ugly Number
59. Missing Number
60. First Bad Version
61. Move Zeroes
62. Word Pattern
63. Nim Game
64. Range Sum Query - Immutable
65. Power of Three
66. Counting Bits
67. Power of Four
68. Reverse String
69. Reverse Vowels of a String
70. Intersection of Two Arrays
71. Intersection of Two Arrays II
72. Valid Perfect Square
73. Guess Number Higher or Lower
74. Ransom Note
75. First Unique Character in a String
76. Find the Difference
77. Is Subsequence
78. Binary Watch
79. Sum of Left Leaves
80. Convert a Number to Hexadecimal
81. Longest Palindrome
82. Fizz Buzz
83. Third Maximum Number
84. Add Strings
85. Number of Segments in a String
86. Arranging Coins
87. Find All Numbers Disappeared in an Array
88. Minimum Moves to Equal Array Elements
89. Assign Cookies
90. Repeated Substring Pattern
91. Hamming Distance
92. Number Complement
93. License Key Formatting
94. Max Consecutive Ones
95. Construct the Rectangle
96. Teemo Attacking
97. Next Greater Element I
98. Keyboard Row
99. Base 7
100. Relative Ranks
101. Perfect Number
102. Fibonacci Number
103. Detect Capital
104. Longest Uncommon Subsequence I
105. Reverse String II
106. Student Attendance Record I
107. Reverse Words in a String III
108. Maximum Depth of N-ary Tree
109. Array Partition
110. Reshape the Matrix
111. Distribute Candies
112. Longest Harmonious Subsequence
113. Minimum Index Sum of Two Lists
114. Can Place Flowers
115. Maximum Product of Three Numbers
116. Maximum Average Subarray I
117. Set Mismatch
118. Robot Return to Origin
119. Longest Continuous Increasing Subsequence
120. Valid Palindrome II
121. Baseball Game
122. Binary Number with Alternating Bits
123. Count Binary Substrings
124. Degree of an Array
125. Long Pressed Name
126. Binary Search
127. To Lower Case
128. 1-bit and 2-bit Characters
129. Self Dividing Numbers

Medium

1. Min Stack
2. Longest Substring Without Repeating Characters
3. Longest Palindromic Substring
4. ZigZag Conversion
5. Reverse Integer
6. String to Integer (atoi)
7. Container With Most Water
8. Integer to Roman
9. 3Sum
10. 3Sum Closest
11. Letter Combinations of a Phone Number
12. 4Sum
13. Generate Parentheses
14. Divide Two Integers
15. Search in Rotated Sorted Array
16. Find First and Last Position of Element in Sorted Array
17. Valid Sudoku
18. Maximum Subarray
19. Count and Say
20. Multiply Strings