LeetCode Problems # Title Beats Difficulty 001 Two Sum 100% easy 002 Add Two Numbers 100% medium 003 Longest Substring Without Repeating Characters 100% medium 004 Median of Two Sorted Arrays 100% hard 005 Longest Palindromic Substring 100% medium 006 ZigZag Conversion 55.3% medium 007 Reverse Integer 100% easy 008 String to Integer(atoi) 100% medium 009 Palindrome Number 88.3% easy 010 Regular Expression Matching - hard 011 Container With Most Water 100% medium 012 Integer to Roman 100% medium 013 Roman to Integer 21% easy 014 Longest Common Prefix 100% easy 015 3Sum 39% medium 016 3Sum Closest 100% medium 017 Letter Combinations of a Phone Number 100% medium 018 4Sum 66.4% medium 019 Remove Nth Node From End of List 100% medium 020 Valid Parentheses 100% easy 021 Merge Two Sorted Lists 100% easy 022 Generate Parentheses 100% medium 023 Merge K Sorted Lists 100% hard 024 Swap Nodes in Pairs 100% medium 025 Reverse Nodes in K-Group 100% hard 026 Remove Duplicates From Sorted Array 100% easy 027 Remove Element 100% easy 028 Implement strStr 100% easy 029 Divide Two Integers 100% medium 030 Substring with Concatenation of All Words ❌ hard 031 Next Permutation 18.6% medium 032 Longest Valid Parentheses 100% hard 033 Search in Rotated Sorted Array 88.3% medium 034 Find First and Last Position of Element in Sorted Array 100% medium 035 Search Insert Position 74.8% easy 036 Valid Sudoku 100% medium 037 Sudoku Solver 100% hard 038 Count and Say 75.7% easy 039 Combination Sum 100% medium 040 Combination Sum II 100% medium 041 First Missing Positive 100% hard 042 Trapping Rain Water 98% hard 043 Multiply Strings 92.6% medium 044 Wildcard Matching 40.3% hard 045 Jump Game II 99.8% hard 046 Permutations 99.8% medium 053 Maximum Subarray 82% easy 058 Length of Last Word 100% easy 066 Plus One 100% easy 067 Add Binary 87.3% easy 069 sqrt(x) 100% easy 070 Climbing Stairs 100% easy 083 Remove Duplicates from Sorted List 100% easy 088 Merge Stored Array 100% easy 100 Same Tree 100% easy 101 Symmertric Tree 100% easy 104 Maximux Depth of Binary Tree 100% easy 107 Binary Tree Level Order Traversal II 100% easy 108 Convert Sorted Array to Binary Search Tree 86% easy 110 Balanced Binary Tree 55% easy 111 Minimum Depth of Binary Tree 100% easy 112 Path Sum 74% easy 118 Pascals Triangle 82.8% easy 119 PAscals Triangle II 76% easy