leetcode python answers for leetcode No (Link of Problem) Title (Link of Solution) 5 Longest Palindromic Substring 6 ZigZag Conversion 14 Longest Common Prefix 15 3Sum 18 4Sum 20 Valid Parentheses 29 Divide Two Integers 30 Substring with Concatenation of All Words (2) 32 Longest Valid Parentheses (2) (3) 36 Valid Sudoku 38 Count and Say 39 Combination Sum 40 Combination Sum II 44 Wildcard Matching 45 Jump Game II 51 N-Queens 52 N-Queens II 56 Merge Intervals 57 Insert Interval 60 Permutation Sequence 68 Text Justification 76 Minimum Window Substring 85 Maximal Rectangle (2) 87 Scramble String 88 Merge Sorted Array 91 Decode Ways 99 Recover Binary Search Tree 107 Binary Tree Level Order Traversal II 112 Path Sum 115 Distinct Subsequences 118 Pascal's Triangle 135 Candy 149 Max Points on a Line (2) 152 Maximum Product Subarray 153 Find Minimum in Rotated Sorted Array 155 Min Stack 179 Largest Number 187 Repeated DNA Sequences 188 Best Time to Buy and Sell Stock IV 200 Number of Islands (2) (3) 201 Bitwise AND of Numbers Range 207 Course Schedule 209 Minimum Size Subarray Sum 213 House Robber II 216 Combination Sum III 230 Kth Smallest Element in a BST 239 Sliding Window Maximum 241 Different Ways to Add Parentheses (2) 257 Binary Tree Paths 268 Missing Number 273 Integer to English Words 275 H-Index II 279 Perfect Squares 289 Game of Life 300 Longest Increasing Subsequence 301 Remove Invalid Parentheses 304 Range Sum Query 2D - Immutable 306 Additive Number