Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 48. Rotate Image | Medium | 63.1% | TopicsArrayMathMatrix |
| 215. Kth Largest Element in an Array | Medium | 62.5% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 621. Task Scheduler | Medium | 62.4% | TopicsArrayHash TableGreedySortingHeap (Priority Queue)Counting |
| 76. Minimum Window Substring | Hard | 62% | TopicsHash TableStringSliding Window |
| 34. Find First and Last Position of Element in Sorted Array | Medium | 61.8% | TopicsArrayBinary Search |
| 1152. Analyze User Website Visit Pattern | Medium | 61.8% | TopicsArrayHash TableStringSorting |
| 75. Sort Colors | Medium | 61.5% | TopicsArrayTwo PointersSortingQuicksortBubble Sort |
| 118. Pascal's Triangle | Easy | 61.3% | TopicsArrayDynamic Programming |
| Meeting Rooms II | Medium | 61.3% | TopicsArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum |
| 283. Move Zeroes | Easy | 61.1% | TopicsArrayTwo Pointers |
| First Missing Positive | Hard | 60.9% | TopicsArrayHash Table |
| 51. N-Queens | Hard | 60.9% | TopicsArrayBacktrackingAlgorithm X |
| 84. Largest Rectangle in Histogram | Hard | 60.7% | TopicsArrayStackMonotonic StackRange Minimum/Maximum Query |
| Asteroid Collision | Medium | 60.7% | TopicsArrayStackSimulation |
| 1011. Capacity To Ship Packages Within D Days | Medium | 60.7% | TopicsArrayBinary Search |
| 62. Unique Paths | Medium | 60.5% | TopicsMathDynamic ProgrammingCombinatorics |
| 13. Roman to Integer | Easy | 60.3% | TopicsHash TableMathString |
| 124. Binary Tree Maximum Path Sum | Hard | 60.1% | TopicsDynamic ProgrammingTreeDepth-First SearchBinary TreeDP on Trees |
| 155. Min Stack | Medium | 60.1% | TopicsStackDesign |
| 162. Find Peak Element | Medium | 60.1% | TopicsArrayBinary Search |
| 3413. Maximum Coins From K Consecutive Bags | Medium | 60.1% | TopicsArrayBinary SearchGreedySliding WindowSortingPrefix Sum |
| 4Sum | Medium | 59.9% | TopicsArrayTwo PointersSorting |
| 424. Longest Repeating Character Replacement | Medium | 59.9% | TopicsHash TableStringSliding Window |
| Insert Delete GetRandom O(1) | Medium | 59.5% | TopicsArrayHash TableMathDesignRandomized |
| 136. Single Number | Easy | 59.1% | TopicsArrayBit Manipulation |
