Leetcode # Title Solution Runtime 3 Longest Substring Without Repeating Characters Java 6 ms 5 Longest Palindromic Substring Java 29 ms 11 Container With Most Water Java 2 ms 12 Integer to Roman Java 9 ms 13 Roman to Integer Java 51 ms 14 Longest Common Prefix Java 0 ms 17 Letter Combinations of a Phone Number Java 0 ms 20 Valid Parentheses Java 1 ms 22 Generate Parentheses Java 26 Remove Duplicates from Sorted Array Java 0 ms 27 Remove Element Java 0 ms 28 Implement strStr() Java 0 ms 38 Count and Say Java 1 ms 49 Group Anagrams Java 6 ms 50 Pow(x, n) Java 0 ms 51 N-Queens Java 6 ms 53 Maximum Subarray Java 1 ms 66 Plus One Java 0 ms 67 Add Binary Java 23 ms 75 Sort Colors Java 0 ms 80 Remove Duplicates from Sorted Array II Java 0 ms 88 Merge Sorted Array Java 0 ms 91 Decode Ways Java 0 ms 102 Binary Tree Level Order Traversal Java 0 ms 121 Best Time to Buy and Sell Stock Java 3 ms 125 Valid Palindrome Java 164 ms 141 Linked List Cycle Java 0 ms 169 Majority Element Java 8 ms 189 Rotate Array Java 421 ms 227 Basic Calculator II Java 10 ms 257 Binary Tree Paths Java 8 ms 274 H-Index Java 1 ms 283 Move Zeroes Java 0 ms 287 Find the Duplicate Number Java 2 ms 292 Nim Game Java 0 ms 344 Reverse String Java 1 ms 350 Intersection of Two Arrays II Java 2 ms 380 Insert Delete GetRandom O(1) Java 242 ms 387 First Unique Character in a String Java 25 ms 437 Path Sum III Java 18 ms 495 Teemo Attacking Java 1 ms 905 Sort Array By Parity Java 1 ms 938 Range Sum of BST Java 0 ms 977 Squares of a Sorted Array Java 1 ms 1046 Last Stone Weight Java 2 ms 1299 Replace Elements with Greatest Element on Right Side Java 1 ms 1480 Running Sum of 1d Array Java 0 ms 1678 Goal Parser Interpretation Java 0 ms 1773 Count Items Matching a Rule Java 4 ms