Leetcode Top 100 Problems With Solutions

Top 100 Leetcode Problems With Solutions

Easy

• Two Sum
• Roman To Integer
• Longest Common Prefix
• Valid Parenthesis
• Merge Two Sorted Lists
• Search Insert Position
• Climbing Stairs
• Binary Tree Inorder Traversal
• Symmetric Tree
• Maximum Depth Of A Binary Tree
• Pascal's Triangle
• Best Time To Buy And Sell Stock
• Single Number
• Linked List Cycle
• Intersection Of Two Linked Lists
• Majority Element
• Reverse Linked List
• Invert Binary Tree
• Palindrome Linked List
• Move Zeroes
• Diameter Of Binary Tree
• Binary Search

Medium

• Add Two Numbers
• Longest Substring Without Repeating Characters
• Longest Palindromic Substring
• Container With Most Water
• 3Sum
• Letter Combinations Of A Phone Number
• Remove Nth Node From End Of List
• Generate Parenthesis
• Swap Nodes In Pair
• Next Permutation
• Search In Rotated Sorted Array
• Find First And Last Position Of Element In Sorted Array
• Combination Sum
• Jump Game ||
• Permutations
• Rotate Image
• Group Anagrams
• Maximum Subarray
• Spiral Matrix
• Jump Game
• Merge Intervals
• Unique Paths
• Minimum Path Sum
• Set Matrix Zeroes
• Search A 2D Matrix
• Sort Colors
• Subsets
• Word Search
• Validate Binary Search Tree
• Binary Tree Level Order Traversal
• Construct Binary Tree From PreOrder And Inorder Traversal
• Flatten Binary Tree To Linked List
• Longest Consecutive Subsequence
• Palindrome Partitioning
• Copy List With Random Pointer
• Word Break
• Linked List Cycle II
• Longest Repeating Character Replacement
• Minimum Window Substring
• Valid Anagram
• Group Anagrams
• Valid Parantheses
• Valid Palindrome
• Longest Palindrome Substring
• Palindrome Substrings
• Encode and Decode Strings

Trees

• Maximum Depth Of Binary Tree
• Same Tree
• Invert Binary Tree
• Binary Tree Maximum Path Sum
• Binary Tree Level Order Traversal
• Serialize and Deserialize Binary Tree
• Subtree Of Another Tree
• Construct Binary Tree From Preorder and Inorder Traversal
• Validate Binary Search Tree
• Kth Smallest Element In BST
• Lowest Common Ancestor of BST
• Implement Trie (Prefix Tree)
• Add and Search Word
• Word Search II