Amazon
2015 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Super Pow | Medium | 7.2% | TopicsMathDivide and ConquerEuler's Totient FunctionEuler's Theorem |
| Shuffle an Array | Medium | 7.2% | TopicsArrayMathDesignRandomized |
| Mini Parser | Medium | 7.2% | TopicsStringStackDepth-First Search |
| Random Pick Index | Medium | 7.2% | TopicsHash TableMathReservoir SamplingRandomized |
| Strong Password Checker | Hard | 7.2% | TopicsStringGreedyHeap (Priority Queue) |
| Find Bottom Left Tree Value | Medium | 7.2% | TopicsTreeDepth-First SearchBreadth-First SearchBinary Tree |
| Erect the Fence | Hard | 7.2% | TopicsArrayMathGeometryConvex HullPolygons |
| Strange Printer | Hard | 7.2% | TopicsStringDynamic Programming |
| Range Module | Hard | 7.2% | TopicsDesignSegment TreeOrdered Set |
| Longest Word in Dictionary | Medium | 7.2% | TopicsArrayHash TableStringTrieSorting |
| 429. N-ary Tree Level Order Traversal | Medium | 7.2% | TopicsTreeBreadth-First Search |
| 788. Rotated Digits | Medium | 7.2% | TopicsMathDynamic Programming |
| Design HashSet | Easy | 7.2% | TopicsArrayHash TableLinked ListDesignHash Function |
| 828. Count Unique Characters of All Substrings of a Given String | Hard | 7.2% | TopicsHash TableStringDynamic Programming |
| 832. Flipping an Image | Easy | 7.2% | TopicsArrayTwo PointersBit ManipulationMatrixSimulation |
| Robot Room Cleaner | Hard | 7.2% | TopicsBacktrackingInteractive |
| 872. Leaf-Similar Trees | Easy | 7.2% | TopicsTreeDepth-First SearchBinary Tree |
| 958. Check Completeness of a Binary Tree | Medium | 7.2% | TopicsTreeBreadth-First SearchBinary Tree |
| 959. Regions Cut By Slashes | Medium | 7.2% | TopicsArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindMatrixPlanar Graph |
| 976. Largest Perimeter Triangle | Easy | 7.2% | TopicsArrayMathGreedySortingQuicksortPolygons |
| 1020. Number of Enclaves | Medium | 7.2% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 1032. Stream of Characters | Hard | 7.2% | TopicsArrayStringDesignTrieData StreamAho–Corasick Algorithm |
| 1229. Meeting Scheduler | Medium | 7.2% | TopicsArrayTwo PointersSorting |
| 1089. Duplicate Zeros | Easy | 7.2% | TopicsArrayTwo Pointers |
| 1244. Design A Leaderboard | Medium | 7.2% | TopicsHash TableDesignSorting |
