🚀 Leet-GFG-360 – The DSA Grind Chronicles

"Solving DSA problems is like debugging your life—sometimes, you just need a better approach!"

Welcome to Leet-GFG-360, where I dump my sanity… I mean, my solutions to DSA problems from LeetCode, GeeksforGeeks, and Coding Ninjas (Code360). If you’re here, either you love DSA (weird flex) or you’re in survival mode for placements/internships—either way, welcome to the club. 🎉

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📌 Standard Problems Covered

📍 Arrays

• 🔹 Two Sum (leetcode1)
• 🔹 Best Time to Buy and Sell Stock (leetcode121)
• 🔹 Maximum Subarray (leetcode53)
• 🔹 Maximum Product Subarray (leetcode152)
• 🔹 Find Minimum in Rotated Sorted Array (leetcode153)
• 🔹 Search in Rotated Sorted Array (leetcode33)
• 🔹 3Sum (leetcode15)
• 🔹 Insert Interval (leetcode57)
• 🔹 Merge Intervals (leetcode56)
• 🔹 Set Matrix Zeroes (leetcode73)
• 🔹 Spiral Matrix (leetcode54)
• 🔹 Rotate Image (leetcode48)
• 🔹 Word Search (leetcode79)
• 🔹 Pascal's Triangle (leetcode118)
• 🔹 Next Permutation (leetcode31)
• 🔹 Sort Colors (leetcode75)
• 🔹 Maximum Subarray (leetcode53)
• 🔹 Merge Sorted Array (leetcode88)
• 🔹 Search a 2D Matrix (leetcode74)
• 🔹 Pow(x, n) (leetcode50)
• 🔹 Majority Element (leetcode169)
• 🔹 Reverse Pairs (leetcode493)
• 🔹 4Sum (leetcode18)

📍 Bit Manipulation

• 🔹 Missing Number (leetcode268)

📍 Dynamic Programming

• 🔹 Climbing Stairs (leetcode70)
• 🔹 Coin Change (leetcode322)
• 🔹 Longest Increasing Subsequence (leetcode300)
• 🔹 Longest Common Subsequence (leetcode1143)
• 🔹 House Robber (leetcode198)
• 🔹 House Robber II (leetcode213)
• 🔹 Unique Paths (leetcode62)
• 🔹 Jump Game (leetcode55)

📍 Graph

• 🔹 Course Schedule (leetcode207)

📍 Greedy Algorithm

• 🔹 Non-overlapping Intervals (leetcode435)

📍 Linked List

• 🔹 Reverse Linked List (leetcode206)
• 🔹 Linked List Cycle (leetcode141)
• 🔹 Merge k Sorted Lists (leetcode23)
• 🔹 Remove Nth Node From End of List (leetcode19)

📍 Strings

• 🔹 Longest Substring Without Repeated Characters (leetcode3)
• 🔹 Longest Repeating Character Replacement (leetcode424)
• 🔹 Minimum Window Substring (leetcode76)
• 🔹 Valid Anagram (leetcode242)
• 🔹 Valid Parentheses (leetcode20)
• 🔹 Valid Palindrome (leetcode125)
• 🔹 Longest Palindromic Substring (leetcode5)

📍 Binary Tree

• 🔹 Maximum Depth of Binary Tree (leetcode104)
• 🔹 Same Tree (leetcode100)
• 🔹 Invert Binary Tree (leetcode226)
• 🔹 Binary Tree Maximum Path Sum (leetcode124)
• 🔹 Binary Tree Level Order Traversal (leetcode102)
• 🔹 Serialize and Deserialize Binary Tree (leetcode297)
• 🔹 Subtree of Another Tree (leetcode572)
• 🔹 Construct Binary Tree from Preorder and Inorder Traversal (leetcode105)

📍 Binary Search Tree

• 🔹 Validate Binary Search Tree (leetcode98)
• 🔹 Lowest Common Ancestor of a Binary Search Tree (leetcode235)
• 🔹 Kth Smallest Element in a BST (leetcode230)

📍 Trie

• 🔹 Implement Trie (Prefix Tree) (leetcode208)

📍 Heaps

• 🔹 Merge k Sorted Lists (leetcode23)
• 🔹 Top K Frequent Elements (leetcode347)
• 🔹 Find Median from Data Stream (leetcode295)

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💡 Contributions?

If you have better solutions (or just want to share your suffering), feel free to open a PR!. Let’s make this repo a DSA haven (or a therapy group)

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📢 Disclaimer

This repo won’t guarantee you a FAANG offer, but it will give you enough problems to make your brain hurt in a productive way. Proceed with caution. 😆

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🌟 Happy Coding & May Your Runtime Always Be O(1)! 🚀

🌟 Star this repo if it saves you from an interview disaster.