Practice problems across 75+ categories
Practice problems frequently asked at Amazon • 3399 problems | 851 Easy | 1772 Medium | 756 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 826 | Dungeon Game | Hard | ArrayDynamic ProgrammingMatrix |
| 827 | Duplicate Emails | Easy | Database |
| 828 | Duplicate Zeros | Easy | ArrayTwo Pointers |
| 829 | Dynamic Pivoting of a Table | Hard | Database |
| 830 | Dynamic Unpivoting of a Table | Hard | Database |
| 831 | Earliest Possible Day of Full Bloom | Hard | ArrayGreedySorting |
| 832 | Earliest Second to Mark Indices I | Medium | ArrayBinary Search |
| 833 | Earliest Second to Mark Indices II | Hard | ArrayBinary SearchGreedy |
| 834 | Eat Pizzas! | Medium | ArrayGreedySorting |
| 835 | Edit Distance | Medium | StringDynamic Programming |
| 836 | Egg Drop With 2 Eggs and N Floors | Medium | MathDynamic Programming |
| 837 | Election Results | Medium | Database |
| 838 | Element Appearing More Than 25% In Sorted Array | Easy | Array |
| 839 | Elements in Array After Removing and Replacing Elements | Medium | Array |
| 840 | Eliminate Maximum Number of Monsters | Medium | ArrayGreedySorting |
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