LeetCode Algorithm # Title 371 Sum of Two Integers 344 Reverse String 258 Add Digits 191 Number of 1 Bits 231 Power of Two 326 Power of Three 342 Power of Four 70 Climbing Stairs 171 Excel Sheet Column Number 168 Excel Sheet Column Title 100 Same Tree 101 Symmetric Tree 292 Nim Game 104 Maximum Depth of Binary Tree 111 Minimum Depth of Binary Tree 263 Ugly Number 264 Ugly Number II 313 Super Ugly Number 66 Plus One 283 Move Zeroes 52 Maximum Subarray 162 Find Peak Element 278 First Bad Version 374 Guess Number Higher or Lower 50 Pow(x, n) 7 Reverse Integer 27 Remove Element 55 Jump Game 389 Find the Difference 136 Single Number 387 First Unique Character in a String 9 Palindrome Number 206 Reverse Linked List 234 Palindrome Linked List 125 Valid Palindrome 242 Valid Anagram 226 Invert Binary Tree 237 Delete Node in a Linked List 203 Remove Linked List Elements 83 Remove Duplicates from Sorted List 129 Sum Root to Leaf Numbers 112 Path Sum 372 Super Pow 110 Balanced Binary Tree 235 Lowest Common Ancestor of a Binary Search Tree 121 Best Time to Buy and Sell Stock 122 Best Time to Buy and Sell Stock II 141 Linked List Cycle 142 Linked List Cycle II 26 Remove Duplicates from Sorted Array 345 Reverse Vowels of a String 349 Intersection of Two Arrays 350 Intersection of Two Arrays II 28 Implement strStr() 67 Add Binary 2 Add Two Numbers 151 Reverse Words in a String