afsify / leetcode

Boost your JavaScript skills with curated LeetCode exercises. From basics to advanced, these hands on challenges help you master JavaScript step by step. Perfect for all skill levels.

LeetCode JavaScript Solutions

Welcome to the LeetCode JavaScript Solutions repository! This collection houses a comprehensive set of JavaScript solutions to LeetCode problems. Whether you're a beginner looking to sharpen your coding skills or an experienced developer aiming to tackle complex algorithms, this repository is here to support your journey.

Features

• Extensive Coverage: Explore solutions to a wide range of LeetCode problems, categorized for easy navigation.
• Clear Explanations: Each solution is accompanied by detailed explanations and comments to help you understand the logic behind the code.
• Optimized Solutions: Discover optimized approaches and best practices for solving LeetCode challenges efficiently.
• Contributor Friendly: Contribute your own solutions or improvements to existing ones to enhance the repository's value for the community.

Solving LeetCode Questions Easily

Problem-Solving Techniques

1. Brute Force:

   • Start with the simplest approach by trying all possible solutions.
   • Useful for small input sizes.

2. Two Pointers:

   • Use two pointers to iterate from different directions.
   • Useful for problems involving arrays or linked lists.

3. Sliding Window:

   • Maintain a window of elements to solve problems involving subarrays or substrings.
   • Useful for problems requiring optimization within a range.

4. Divide and Conquer:

   • Break the problem into smaller subproblems, solve them independently, and combine the results.
   • Useful for problems involving recursion or tree structures.

5. Dynamic Programming:

   • Store the results of subproblems to avoid redundant computations.
   • Useful for optimization problems, especially those involving sequences or matrices.

6. Backtracking:

   • Explore all possible solutions by making and unmaking choices.
   • Useful for constraint satisfaction problems like permutations, combinations, and puzzles.

7. Greedy Algorithm:

   • Make the locally optimal choice at each step with the hope of finding a global optimum.
   • Useful for optimization problems involving sorting or selection.

8. Hashing:

   • Use hash tables to store and lookup values efficiently.
   • Useful for problems involving quick access and retrieval of data.

Tips for Efficient Problem Solving

1. Understand the Problem Statement:

   • Read the problem statement carefully.
   • Identify the input, output, and constraints.

2. Plan Your Approach:

   • Think about the possible ways to solve the problem.
   • Consider the time and space complexity of each approach.

3. Write Pseudocode:

   • Outline your solution in pseudocode before coding.
   • Helps in organizing your thoughts and identifying potential issues.

4. Test Your Solution:

   • Test your code with different inputs, including edge cases.
   • Ensure that your solution handles all possible scenarios.

5. Optimize Your Code:

   • Look for ways to improve the efficiency of your solution.
   • Consider alternative data structures or algorithms if needed.

Common Patterns in LeetCode Problems

1. Array Manipulation:

   • Problems involving searching, sorting, or modifying arrays.

2. String Processing:

   • Problems involving substring searches, pattern matching, or string manipulation.

3. Linked List Operations:

   • Problems involving traversal, modification, or reversal of linked lists.

4. Tree and Graph Traversal:

   • Problems involving traversal, search, or modification of trees and graphs.

5. Dynamic Programming:

   • Problems involving optimization and finding the best solution among many.

6. Math and Number Theory:

   • Problems involving mathematical computations or properties of numbers.

7. Bit Manipulation:

   • Problems involving operations on binary representations of numbers.

8. Combinatorial Problems:

   • Problems involving permutations, combinations, or generating subsets.

By following these techniques and patterns, you can enhance your problem-solving skills and tackle LeetCode challenges more effectively.

Getting Started

To get started with the LeetCode JavaScript Solutions repository, follow these simple steps:

git clone https://github.com/afsify/leetcode.git

1. Clone the Repository: Use the following command to clone the repository to your local machine:

2. Explore Solutions: Browse through the directories to find solutions to specific LeetCode problems. Each solution is contained within its own file, along with a corresponding problem statement.

3. Contribute: If you have a new solution to contribute or improvements to existing ones, feel free to submit a pull request. Contributions from the community are highly encouraged!