Leetcode Questions S/N Leetcode Id Difficulty Question Answer 1 1 Easy Two Sum JS 2 9 Easy Palindrome Number JS 3 13 Easy Roman to Integer JS 4 14 Easy Longest Common Prefix JS 5 20 Easy Valid Parentheses JS 6 21 Easy Merge Two Sorted Lists JS 7 26 Easy Remove Duplicates from Sorted Array JS 8 27 Easy Remove Element JS 9 35 Easy Search Insert Position JS 10 58 Easy Length of Last Word JS 11 66 Easy Plus One JS 12 67 Easy Add Binary JS 13 69 Easy Sqrt(x) JS 14 83 Easy Remove Duplicates from Sorted List JS 15 88 Easy Merge Sorted Array JS 16 94 Easy Binary Tree Inorder Traversal JS 17 104 Easy Maximum Depth of Binary Tree JS 18 118 Easy Pascal's Triangle JS 19 119 Easy Pascal's Triangle II JS 20 125 Easy Valid Palindrome JS 21 136 Easy Single Number JS 22 141 Easy Linked List Cycle JS 23 144 Easy Binary Tree Preorder Traversal JS 24 145 Easy Binary Tree Postorder Traversal JS 25 168 Easy Excel Sheet Column Title JS 26 169 Easy Majority Element JS 27 171 Easy Excel Sheet Column Number JS 28 175 Easy Combine Two Tables SQL 29 182 Easy Duplicate Emails SQL 30 183 Easy Customers Who Never Order SQL 31 191 Easy Number of 1 Bits JS 32 202 Easy Happy Number JS 33 203 Easy Remove Linked List Elements JS 34 206 Easy Reverse Linked List JS 35 217 Easy Contains Duplicate JS 36 219 Easy Contains Duplicate II JS 37 225 Easy Implement Stack using Queues JS 38 226 Easy Invert Binary Tree JS 39 228 Easy Summary Ranges JS 40 231 Easy Power of Two JS 41 232 Easy Implement Queue using Stacks JS 42 234 Easy Palindrome Linked List JS 43 242 Easy Valid Anagram JS 44 258 Easy Add Digits JS 45 263 Easy Ugly Number JS 46 268 Easy Missing Number JS 47 283 Easy Move Zeroes JS 48 290 Easy Word Pattern JS 49 303 Easy Range Sum Query - Immutable JS 50 326 Easy Power of Three JS 51 338 Easy Counting Bits JS 52 342 Easy Power of Four JS 53 344 Easy Reverse String JS 54 345 Easy Reverse Vowels of a String JS 55 349 Easy Intersection of Two Arrays JS 56 350 Easy Intersection of Two Arrays II JS 57 367 Easy Valid Perfect Square JS 58 374 Easy Guess Number Higher or Lower JS 59 383 Easy Ransom Note JS 60 387 Easy First Unique Character in a String JS 61 389 Easy Find the Difference JS 62 392 Easy Is Subsequence JS 63 412 Easy Fizz Buzz JS 64 414 Easy Third Maximum Number JS 65 434 Easy Number of Segments in a String JS 66 448 Easy Find All Numbers Disappeared in an Array JS 67 461 Easy Hamming Distance JS 68 476 Easy Number Complement JS 69 485 Easy Max Consecutive Ones JS 70 496 Easy Next Greater Element I JS 71 500 Easy Keyboard Row JS 72 504 Easy Base 7 JS 73 506 Easy Relative Ranks JS 74 507 Easy Perfect Number JS 75 509 Easy Fibonacci Number JS 76 520 Easy Detect Capital JS 77 530 Easy Minimum Absolute Difference in BST JS 78 551 Easy Student Attendance Record I JS 79 557 Easy Reverse Words in a String III JS 80 595 Easy Big Countries JS 81 620 Easy Not Boring Movies JS 82 674 Easy Longest Continuous Increasing Subsequence JS 83 693 Easy Binary Number with Alternating Bits JS 84 700 Easy Search in a Binary Search Tree JS 85 704 Easy Binary Search JS 86 705 Easy Design HashSet JS 87 706 Easy Design HashMap JS 88 709 Easy To Lower Case JS 89 724 Easy Find Pivot Index JS 90 728 Easy Self Dividing Numbers JS 91 744 Easy Find Smallest Letter Greater Than Target JS 92 747 Easy Largest Number At Least Twice of Others JS 93 771 Easy Jewels and Stones JS 94 783 Easy Minimum Distance Between BST Nodes JS 95 796 Easy Rotate String JS 96 804 Easy Unique Morse Code Words JS 97 819 Easy Most Common Word JS 98 821 Easy Shortest Distance to a Character JS 99 824 Easy Goat Latin JS 100 830 Easy Positions of Large Groups JS