LeetCode

LeetCode Algorithm

LeetCode solutions in Java.

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Links

• Web Site

QA List

| # | Title | Tag | | :--- | :--------------------------------------- | :--------------------------------------- | | 1 | TwoSum | Integer | | 2 | Add Two Numbers | Linked List, Math | | 3 | Longest Substring Without Repeating Characters | Hash Table, String | | 4 | Median of Two Sorted Arrays | Array, Binary Search, Divide and Conquer | | 5 | Longest Palindromic Substring | String | | 6 | ZigZag Conversion | String | | 7 | Reverse Integer | Math | | 8 | String to Integer (atoi) | Math, String | | 9 | Palindrome Number | Math | | 10 | Regular Expression Matching | String, Dynamic Programming, Backtracking | | 11 | Container With Most Water | Array, Two Pointers | | 12 | Integer to Roman | Math, String | | 13 | Roman to Integer | Math, String | | 14 | Longest Common Prefix | String | | 15 | 3Sum | Array, Two Pointers | | 16 | 3Sum Closest | Array, Two Pointers | | 17 | Letter Combinations of a Phone Number | String, Backtracking | | 18 | 4Sum | Array, Hash Table, Two Pointers | | 19 | Remove Nth Node From End of List | Array | | 20 | Valid Parentheses | Array | | 21 | Merge Two Sorted Lists | LinedList | | 22 | Generate Parentheses | Recursion | | 23 | Merge k Sorted Lists | Linked List, Heap | | 24 | Swap Nodes in Pairs | Linked List | | 25 | Reverse Nodes in k-Group | Linked List | | 26 | Remove Duplicates from Sorted Array | Array | | 27 | Remove Element | Array | | 28 | Implement strStr | String, Two Pointers | | 29 | Divide Two Integers | Binary Search | | 30 | Substring with Concatenation of All Words | HashTable, Two Pointers |