Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 91 | Contains Duplicate | Easy | ArrayHash TableSorting |
| 92 | Contains Duplicate II | Easy | ArrayHash TableSliding Window |
| 93 | Convert a Number to Hexadecimal | Easy | MathStringBit Manipulation |
| 94 | Convert Binary Number in a Linked List to Integer | Easy | Linked ListMath |
| 95 | Convert Date to Binary | Easy | MathString |
| 96 | Convert Integer to the Sum of Two No-Zero Integers | Easy | Math |
| 97 | Convert Sorted Array to Binary Search Tree | Easy | ArrayDivide and ConquerTree |
| 98 | Convert to Base -2 | Unknown | Math |
| 99 | Copy List with Random Pointer | Medium | Hash TableLinked List |
| 100 | Count Almost Equal Pairs II | Hard | ArrayHash TableSorting |
| 101 | Count and Say | Medium | String |
| 102 | Count Artist Occurrences On Spotify Ranking List | Easy | Database |
| 103 | Count Collisions of Monkeys on a Polygon | Medium | MathRecursion |
| 104 | Count Complete Tree Nodes | Easy | Binary SearchBit ManipulationTree |
| 105 | Count Days Spent Together | Easy | MathString |
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