Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 121 | Count Submatrices With All Ones | Medium | ArrayDynamic ProgrammingStack |
| 122 | Count Symmetric Integers | Easy | MathEnumeration |
| 123 | Count Tested Devices After Test Operations | Easy | ArraySimulationCounting |
| 124 | Count the Number of Consistent Strings | Easy | ArrayHash TableString |
| 125 | Count the Number of Fair Pairs | Medium | ArrayTwo PointersBinary Search |
| 126 | Course Schedule | Medium | Depth-First SearchBreadth-First SearchGraph |
| 127 | Crawler Log Folder | Easy | ArrayStringStack |
| 128 | Create Target Array in the Given Order | Easy | ArraySimulation |
| 129 | Customer Placing the Largest Number of Orders | Easy | Database |
| 130 | Daily Temperatures | Medium | ArrayStackMonotonic Stack |
| 131 | Day of the Week | Easy | Math |
| 132 | Day of the Year | Easy | MathString |
| 133 | Decode Ways II | Hard | StringDynamic Programming |
| 134 | Decoded String at Index | Medium | StringStack |
| 135 | Deepest Leaves Sum | Medium | TreeDepth-First SearchBreadth-First Search |
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