LeetCode LeetCode solutions in C++ 11 and python3. NO. Title Solution Add Date Difficulty 1 Two Sum C++ 2017-09-26 Easy 2 Add Two Numbers C++ 2017-09-30 Medium 3 Longest Substring Without Repeating Characters C++ 2017-10-01 Medium 4 Median of Two Sorted Arrays C++ 2017-10-02 Hard 5 Longest Palindromic Substring C++ 2017-10-03 Medium 6 ZigZag Conversion C++ 2017-10-04 Medium 7 Reverse Integer C++ 2017-10-05 Easy 8 String to Integer (atoi) C++ 2017-10-07 Medium 9 Palindrome Number C++ 2017-10-07 Easy 10 Regular Expression Matching C++ 2017-10-08 Hard 11 Container With Most Water C++ 2017-10-08 Medium 12 Integer to Roman C++ 2017-10-10 Medium 13 Roman to Integer C++ 2017-10-10 Easy 14 Longest Common Prefix C++ 2017-10-10 Easy 15 3Sum C++ 2017-10-10 Medium 16 3Sum Closest C++ 2017-10-11 Medium 17 Letter Combinations of a Phone Number C++ 2017-10-12 Medium 18 4Sum C++ 2017-10-14 Medium 19 Remove Nth Node From End of List C++ 2017-10-15 Medium 20 Valid Parentheses C++ 2017-10-16 Easy 21 Merge Two Sorted Lists C++ 2017-10-16 Easy 22 Generate Parentheses C++ 2017-10-16 Medium 23 Merge k Sorted Lists C++ 2017-10-16 Hard 24 Swap Nodes in Pairs C++ 2017-10-17 Medium 25 Reverse Nodes in k-Group C++ 2017-10-19 Hard 26 Remove Duplicates from Sorted Array C++ 2017-10-20 Easy 27 Remove Element C++ 2017-10-20 Easy 28 Implement strStr() C++ 2017-10-20 Easy 29 Divide Two Integers C++ 2017-10-21 Medium 30 Substring with Concatenation of All Words C++ 2017-10-27 Hard 31 Next Permutation C++ 2017-10-29 Medium 32 Longest Valid Parentheses C++ 2017-10-31 Hard 33 Search in Rotated Sorted Array C++ 2017-11-1 Medium 34 Search for a Range C++ 2017-11-1 Medium 49 Group Anagrams python3 2018-8-6 Medium 98 Validate Binary Search Tree python3 2018-7-11 Medium 113 Path Sum II python3 2018-7-4 Medium 215 Kth Largest Element in an Array python3 2108-8-6 Medium 230 Kth Smallest Element in a BST C++ 2018-5-23 Medium 344 Reverse String C++ 2018-5-28 Easy 409 Longest Palindrome python3 2018-5-23 Easy 412 Fizz Buzz python3 2017-6-3 Easy 434 Number of Segments in a String python3 2018-8-7 Easy 461 Hamming Distance C++ 2017-11-3 Easy 476 Number Complement python3 2018-5-30 Easy 516 Longest Palindromic Subsequence python3 2018-8-9 Medium 556 Reshape the Matrix python3 2018-7-4 Easy 557 Reverse Words in a String III python3 2018-6-5 Easy 560 Subarray Sum Equals K python3 2018-8-7 Medium 561 Array Partition I C++ 2017-11-6 Easy 575 Distribute Candies python3 2018-6-22 Easy 617 Merge Two Binary Trees C++ 2017-11-4 Easy 657 Judge Route Circle C++ 2017-11-4 Easy 669 Trim a Binary Search Tree python3 2018-6-2 Easy 682 Baseball Game python3 2018-6-5 Easy 698 Partition to K Equal Sum Subsets python3 2018-5-24 Medium 704 Binary Search python3 2018-8-6 Easy 728 Self Dividing Numbers python3 2018-5-24 Easy 766 Toeplitz Matrix python3 2018-6-3 Easy 806 Number of Lines To Write String python3 2018-6-4 Easy 832 Flipping an Image python3 2018-6-4 Easy 859 Buddy Strings python3 2018-7-11 Easy 868 Transpose Matrix python3 2018-7-9 Easy