Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1366 | Investments in 2016 | Medium | Database |
| 1367 | IP to CIDR | Medium | StringBit Manipulation |
| 1368 | IPO | Hard | ArrayGreedySorting |
| 1369 | Is Array a Preorder of Some Binary Tree | Medium | StackTreeDepth-First Search |
| 1370 | Is Graph Bipartite? | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 1371 | Is Object Empty | Easy | JavaScript |
| 1372 | Is Subsequence | Easy | Two PointersStringDynamic Programming |
| 1373 | Island Perimeter | Easy | ArrayDepth-First SearchBreadth-First Search |
| 1374 | Isomorphic Strings | Easy | Hash TableString |
| 1375 | Iterator for Combination | Medium | StringBacktrackingDesign |
| 1376 | Jewels and Stones | Easy | Hash TableString |
| 1377 | Join Two Arrays by ID | Medium | JavaScript |
| 1378 | Jump Game | Medium | ArrayDynamic ProgrammingGreedy |
| 1379 | Jump Game II | Medium | ArrayDynamic ProgrammingGreedy |
| 1380 | Jump Game III | Medium | ArrayDepth-First SearchBreadth-First Search |
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