Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 31 | Add Two Integers | Easy | Math |
| 32 | Add Two Numbers | Medium | Linked ListMathRecursion |
| 33 | Add Two Numbers II | Medium | Linked ListMathStack |
| 34 | Add Two Polynomials Represented as Linked Lists | Medium | Linked ListMathTwo Pointers |
| 35 | Add Two Promises | Easy | JavaScript |
| 36 | Adding Spaces to a String | Medium | ArrayTwo PointersString |
| 37 | Adding Two Negabinary Numbers | Medium | ArrayMath |
| 38 | Additive Number | Medium | StringBacktracking |
| 39 | Adjacent Increasing Subarrays Detection I | Easy | Array |
| 40 | Adjacent Increasing Subarrays Detection II | Medium | ArrayBinary Search |
| 41 | Ads Performance | Easy | Database |
| 42 | Advantage Shuffle | Medium | ArrayTwo PointersGreedy |
| 43 | Airplane Seat Assignment Probability | Medium | MathDynamic ProgrammingBrainteaser |
| 44 | Alert Using Same Key-Card Three or More Times in a One Hour Period | Medium | ArrayHash TableString |
| 45 | Alice and Bob Playing Flower Game | Medium | Math |
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