Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 226 | Iterator for Combination | Medium | StringBacktrackingDesign |
| 227 | Jump Game II | Medium | ArrayDynamic ProgrammingGreedy |
| 228 | K Closest Points to Origin | Medium | ArrayMathDivide and Conquer |
| 229 | K Highest Ranked Items Within a Price Range | Medium | ArrayBreadth-First SearchSorting |
| 230 | K-th Nearest Obstacle Queries | Medium | ArrayHeap (Priority Queue) |
| 231 | K-th Smallest Prime Fraction | Medium | ArrayTwo PointersBinary Search |
| 232 | Keyboard Row | Easy | ArrayHash TableString |
| 233 | Kth Largest Element in an Array | Medium | ArrayDivide and ConquerSorting |
| 234 | Largest 1-Bordered Square | Medium | ArrayDynamic ProgrammingMatrix |
| 235 | Largest BST Subtree | Medium | Dynamic ProgrammingTreeDepth-First Search |
| 236 | Largest Multiple of Three | Hard | ArrayMathDynamic Programming |
| 237 | Largest Sum of Averages | Medium | ArrayDynamic ProgrammingPrefix Sum |
| 238 | Largest Time for Given Digits | Medium | ArrayStringBacktracking |
| 239 | Least Number of Unique Integers after K Removals | Medium | ArrayHash TableGreedy |
| 240 | Lemonade Change | Easy | ArrayGreedy |
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