Practice problems across 75+ categories
Practice problems frequently asked at Apple • 571 problems | 192 Easy | 283 Medium | 92 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 166 | Find Closest Number to Zero | Easy | Array |
| 167 | Find Common Characters | Easy | ArrayHash TableString |
| 168 | Find Distance in a Binary Tree | Medium | Hash TableTreeDepth-First Search |
| 169 | Find First and Last Position of Element in Sorted Array | Medium | ArrayBinary Search |
| 170 | Find Greatest Common Divisor of Array | Easy | ArrayMathNumber Theory |
| 171 | Find K Closest Elements | Medium | ArrayTwo PointersBinary Search |
| 172 | Find K-Length Substrings With No Repeated Characters | Medium | Hash TableStringSliding Window |
| 173 | Find K Pairs with Smallest Sums | Medium | ArrayHeap (Priority Queue) |
| 174 | Find Minimum in Rotated Sorted Array | Medium | ArrayBinary Search |
| 175 | Find Minimum in Rotated Sorted Array II | Hard | ArrayBinary Search |
| 176 | Find Missing and Repeated Values | Easy | ArrayHash TableMath |
| 177 | Find Missing Observations | Medium | ArrayMathSimulation |
| 178 | Find Number of Coins to Place in Tree Nodes | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 179 | Find Overlapping Shifts | Unknown | Database |
| 180 | Find Peak Calling Hours for Each City | Medium | Database |
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