Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Majority Element II | Medium | 43.1% | TopicsArrayHash TableSortingCountingBoyer–Moore Majority Vote Algorithm |
| 977. Squares of a Sorted Array | Easy | 43.1% | TopicsArrayTwo PointersSorting |
| 451. Sort Characters By Frequency | Medium | 42.6% | TopicsHash TableStringSortingHeap (Priority Queue)Bucket SortCounting |
| 645. Set Mismatch | Easy | 42.6% | TopicsArrayHash TableBit ManipulationSorting |
| Accounts Merge | Medium | 42.6% | TopicsArrayHash TableStringDepth-First SearchBreadth-First SearchUnion-FindSorting |
| 881. Boats to Save People | Medium | 42.6% | TopicsArrayTwo PointersGreedySortingTimsort |
| 1480. Running Sum of 1d Array | Easy | 42.6% | TopicsArrayPrefix Sum |
| 1603. Design Parking System | Easy | 42.6% | TopicsDesignSimulationCounting |
| 213. House Robber II | Medium | 42% | TopicsArrayDynamic Programming |
| 231. Power of Two | Easy | 42% | TopicsMathBit ManipulationRecursion |
| Managers with at Least 5 Direct Reports | Medium | 42% | TopicsDatabase |
| 746. Min Cost Climbing Stairs | Easy | 42% | TopicsArrayDynamic Programming |
| 763. Partition Labels | Medium | 42% | TopicsHash TableTwo PointersStringGreedy |
| 1482. Minimum Number of Days to Make m Bouquets | Medium | 42% | TopicsArrayBinary Search |
| 2235. Add Two Integers | Easy | 42% | TopicsMath |
| 3914. Minimum Operations to Make Array Non Decreasing | Medium | 42% | TopicsArrayGreedy |
| Search in Rotated Sorted Array II | Medium | 41.5% | TopicsArrayBinary Search |
| Remove Duplicates from Sorted List | Easy | 41.5% | TopicsLinked List |
| Word Ladder II | Hard | 41.5% | TopicsHash TableStringBacktrackingBreadth-First SearchBidirectional Search |
| 226. Invert Binary Tree | Easy | 41.5% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Trapping Rain Water II | Hard | 41.5% | TopicsArrayBreadth-First SearchHeap (Priority Queue)Matrix |
| Average Selling Price | Easy | 41.5% | TopicsDatabase |
| 1423. Maximum Points You Can Obtain from Cards | Medium | 41.5% | TopicsArraySliding WindowPrefix Sum |
| 1492. The kth Factor of n | Medium | 41.5% | TopicsMathNumber TheoryPrime Factorization |
| 1642. Furthest Building You Can Reach | Medium | 41.5% | TopicsArrayGreedyHeap (Priority Queue) |
