LeetCode problems with complete JavaScript solutions for interview preparation.
This repository contains important LeetCode problems organized by topic. Each problem includes brute force approach, optimal solution, complexity analysis, and visual diagrams.
Arrays - Array manipulation, searching, sorting
Strings - String operations, pattern matching
Linked List - Pointer manipulation, cycles
Trees - Binary trees, BST, traversals
Dynamic Programming - Memoization, tabulation
Graphs - BFS, DFS, shortest paths
Backtracking - Exploring all possibilities
Stack - LIFO operations
Binary Search - Search optimization
Heap - Priority queues
Two Pointers - Efficient traversal
Sliding Window - Subarray problems
Hash Map - Fast lookups
Greedy - Local optimal choices
Trie - Prefix trees
- Pick a topic
- Open any problem
- Study the brute force approach
- Learn the optimal solution
- Practice coding both
- Test on LeetCode
Each problem includes:
- LeetCode link
- Brute force code
- Optimal code
- Complexity analysis
- Visual diagram
Contributions welcome! Add problems, improve solutions, or fix errors.
Happy coding!