Easy # Title Acceptance 13 Roman to Integer 45.9% 21 Merge Two Sorted Lists 39.2% 27 Remove Element 39.4% 35 Search Insert Position 39.8% 53 Maximum Subarray 39.7% 66 Plus One 38.8% 70 Climbing Stairs 40.2% 83 Remove Duplicates from Sorted List 39.9% 100 Same Tree 46.6% 101 Symmetric Tree 39.1% 104 Maximum Depth of Binary Tree 52.7% 107 Binary Tree Level Order Traversal II 40.6% 108 Convert Sorted Array to Binary Search Tree 42.4% 118 Pascal's Triangle 38.9% 119 Pascal's Triangle II 37.2% 121 Best Time to Buy and Sell Stock 41.3% 122 Best Time to Buy and Sell Stock II 47.1% 136 Single Number 54.5% 167 Two Sum II - Input array is sorted 47.1% 168 Excel Sheet Column Title 26.1% 169 Majority Element 46.7% 171 Excel Sheet Column Number 47.2% 191 Number of 1 Bits 39.8% 198 House Robber 39.2% 202 Happy Number 40.8% 206 Reverse Linked List 45.5% 217 Contains Duplicate 45.9% 226 Invert Binary Tree 51.9% 231 Power of Two 40.3% 235 Lowest Common Ancestor of a Binary Search Tree 39.2% 237 Delete Node in a Linked List 46.6% 242 Valid Anagram 46.5% 257 Binary Tree Paths 39.0% 258 Add Digits 51.2% 263 Ugly Number 39.3% 268 Missing Number 44.3% 283 Move Zeroes 50.0% 292 Nim Game 55.2% 326 Power of Three 40.3% 342 Power of Four 38.6% 344 Reverse String 59.2% 345 Reverse Vowels of a String 38.6% 349 Intersection of Two Arrays 47.3% 350 Intersection of Two Arrays II 44.7% 367 Valid Perfect Square 38.2% 371 Sum of Two Integers 51.2% 383 Ransom Note 47.2% 387 First Unique Character in a String 46.7% 389 Find the Difference 50.7% 401 Binary Watch 44.8% 404 Sum of Left Leaves 47.0% 405 Convert a Number to Hexadecimal 41.0% 409 Longest Palindrome 45.4% 412 Fizz Buzz 58.7% 415 Add Strings 41.5% 437 Path Sum III 39.8% 447 Number of Boomerangs 45.2% 448 Find All Numbers Disappeared in an Array 51.4% 453 Minimum Moves to Equal Array Elements 47.5% 455 Assign Cookies 47.1% 461 Hamming Distance 69.9% 463 Island Perimeter 57.1% 476 Number Complement 60.9% 485 Max Consecutive Ones 54.0% 492 Construct the Rectangle 48.6% 496 Next Greater Element I 56.8% 500 Keyboard Row 59.8% 504 Base 7 44.3% 506 Relative Ranks 46.5% 520 Detect Capital 52.0% 521 Longest Uncommon Subsequence I 55.5% 530 Minimum Absolute Difference in BST 47.2% 538 Convert BST to Greater Tree 49.7% 541 Reverse String II 43.7% 543 Diameter of Binary Tree 44.0% 551 Student Attendance Record I 44.0% 557 Reverse Words in a String III 59.6% 561 Array Partition I 67.1% 563 Binary Tree Tilt 46.8% 566 Reshape the Matrix 59.1% 572 Subtree of Another Tree 40.7% 575 Distribute Candies 59.2% 594 Longest Harmonious Subsequence 40.8% 598 Range Addition II 48.1% 599 Minimum Index Sum of Two Lists 46.8% 606 Construct String from Binary Tree 50.1% 617 Merge Two Binary Trees 68.3% 628 Maximum Product of Three Numbers 45.3% 637 Average of Levels in Binary Tree 55.8% 645 Set Mismatch 40.3% 653 Two Sum IV - Input is a BST 51.1% 657 Judge Route Circle 69.7% 661 Image Smoother 47.4% 669 Trim a Binary Search Tree 58.5% 671 Second Minimum Node In a Binary Tree 42.8% 674 Longest Continuous Increasing Subsequence 43.8% 682 Baseball Game 58.5%