Top Amazon Questions

# Title Frequency Solution Acceptance Difficulty
# Title Frequency Solution Acceptance Difficulty
534 Design TinyURL 99 0.0%
1 Two Sum 99 Link 36.4%
2 Add Two Numbers 99 Link 28.2%
3 Longest Substring Without Repeating Characters 96 Link 24.5%
20 Valid Parentheses 95 33.7%
21 Merge Two Sorted Lists 95 Link 39.5%
535 Encode and Decode TinyURL 94 Link 74.1%
5 Longest Palindromic Substring 94 Link 25.2%
206 Reverse Linked List 94 Link 46.3%
146 LRU Cache 94 18.9%
155 Min Stack 94 30.0%
23 Merge k Sorted Lists 92 Link 27.8%
141 Linked List Cycle 92 Link 35.2%
121 Best Time to Buy and Sell Stock 91 Link 42.2%
42 Trapping Rain Water 91 Link 37.3%
15 3Sum 90 21.8%
238 Product of Array Except Self 89 49.9%
17 Letter Combinations of a Phone Number 88 35.6%
138 Copy List with Random Pointer 87 26.0%
617 Merge Two Binary Trees 86 Link 67.7%
139 Word Break 86 Link 30.9%
200 Number of Islands 85 Link 35.8%
49 Group Anagrams 85 Link 36.8%
48 Rotate Image 85 40.2%
8 String to Integer (atoi) 85 13.9%
234 Palindrome Linked List 84 33.2%
160 Intersection of Two Linked Lists 84 Link 30.8%
242 Valid Anagram 80 Link 47.0%
235 Lowest Common Ancestor of a Binary Search Tree 79 39.5%
387 First Unique Character in a String 77 47.2%
189 Rotate Array 77 Link 25.1%
89 Gray Code 74 41.9%
73 Set Matrix Zeroes 73 36.3%
167 Two Sum II - Input array is sorted 72 Link 47.2%
240 Search a 2D Matrix II 72 Link 38.9%
204 Count Primes 70 26.7%
236 Lowest Common Ancestor of a Binary Tree 70 30.0%
127 Word Ladder 69 19.7%
297 Serialize and Deserialize Binary Tree 66 34.1%
215 Kth Largest Element in an Array 65 40.0%
78 Subsets 65 42.9%
102 Binary Tree Level Order Traversal 64 41.3%
119 Pascal's Triangle II 61 37.6%
239 Sliding Window Maximum 56 33.7%
199 Binary Tree Right Side View 55 Link 41.8%
126 Word Ladder II 54 14.6%
380 Insert Delete GetRandom O(1) 50 39.5%
98 Validate Binary Search Tree 49 23.8%
460 LFU Cache 48 24.6%
661 Image Smoother 45 Link 45.9%
451 Sort Characters By Frequency 45 51.3%
516 Longest Palindromic Subsequence 43 42.6%
396 Rotate Function 43 33.5%
682 Baseball Game 42 Link 58.6%
449 Serialize and Deserialize BST 42 42.4%
606 Construct String from Binary Tree 41 Link 49.6%
438 Find All Anagrams in a String 41 33.9%
538 Convert BST to Greater Tree 41 Link 49.1%
414 Third Maximum Number 36 27.9%
459 Repeated Substring Pattern 33 38.2%
186 Reverse Words in a String II 30 28.1%
537 Complex Number Multiplication 30 Link 64.0%
529 Minesweeper 29 49.6%
355 Design Twitter 28 25.7%
645 Set Mismatch 27 Link 39.9%
692 Top K Frequent Words 27 Link 40.8%
553 Optimal Division 25 Link 54.9%
646 Maximum Length of Pair Chain 24 Link 47.6%
508 Most Frequent Subtree Sum 23 52.2%
517 Super Washing Machines 23 36.5%
532 K-diff Pairs in an Array 22 28.2%
746 Min Cost Climbing Stairs 19 Link 47.9%
662 Maximum Width of Binary Tree 19 Link 37.7%
675 Cut Off Trees for Golf Event 19 Link 26.7%
711 Number of Distinct Islands II 18 Link 40.2%
545 Boundary of Binary Tree 16 Link 31.9%
640 Solve the Equation 15 Link 38.9%
725 Split Linked List in Parts 13 Link 49.7%
763 Partition Labels 8 Link 67.3%
663 Equal Tree Partition 8 Link 36.5%
536 Construct Binary Tree from String 7 42.8%
694 Number of Distinct Islands 6 Link 44.7%
579 Find Cumulative Salary of an Employee 2 Link 27.2%
738 Monotone Increasing Digits 1 Link 41.3%
762 Prime Number of Set Bits in Binary Representation 0 Link 54.0%
742 Closest Leaf in a Binary Tree 0 Link 31.6%
# Title Frequency Solution Acceptance Difficulty
# Title Frequency Solution Acceptance Difficulty
186 Reverse Words in a String II 30 28.1%
711 Number of Distinct Islands II 18 Link 40.2%
545 Boundary of Binary Tree 16 Link 31.9%
663 Equal Tree Partition 8 Link 36.5%
536 Construct Binary Tree from String 7 42.8%
694 Number of Distinct Islands 6 Link 44.7%
579 Find Cumulative Salary of an Employee 2 Link 27.2%
742 Closest Leaf in a Binary Tree 0 Link 31.6%