Leetcode # Title Solution Runtime 1 Two Sum Java 0 ms 7 Reverse Integer Java 1 ms 8 String to Integer (atoi) Java 3 ms 9 Palindrome Number Java 7 ms 14 Longest Common Prefix Java 2 ms 19 Remove Nth Node From End of List Java 0 ms 20 Valid Parentheses Java 1 ms 21 Merge Two Sorted Lists Java 0 ms 26 Remove Duplicates from Sorted Array Java 0 ms 28 Implement strStr() Java 0 ms 36 Valid Sudoku Java 6 ms 48 Rotate Image Java 0 ms 66 Plus One Java 4 ms 70 Climbing Stairs Java 0 ms 88 Merge Sorted Array Java 0 ms 98 Validate Binary Search Tree Java 0 ms 100 Same Tree Java 0 ms 104 Maximum Depth of Binary Tree Java 0 ms 108 Convert Sorted Array to Binary Search Tree Java 0 ms 121 Best Time to Buy and Sell Stock Java 2 ms 125 Valid Palindrome Java 7 ms 136 Single Number Java 1 ms 155 Min Stack Java 10 ms 169 Majority Element Java 32 ms 189 Rotate Array Java 1 ms 191 Number of 1 Bits Java 0 ms 198 House Robber Java 0 ms 204 Count Primes Java 115 ms 206 Reverse Linked List Java 0 ms 217 Contains Duplicate Java 6 ms 226 Invert Binary Tree Java 0 ms 237 Delete Node in a Linked List Java 0 ms 242 Valid Anagram Java 21 ms 268 Missing Number Java 0 ms 278 First Bad Version Java 15 ms 283 Move Zeroes Java 0 ms 326 Power of Three Java 11 ms 344 Reverse String Java 0 ms 350 Intersection of Two Arrays II Java 6 ms 383 Ransom Note Java 2 ms 387 First Unique Character in a String Java 37 ms 412 Fizz Buzz Java 2 ms 461 Hamming Distance Java 0 ms