Practice problems across 75+ categories
Practice problems frequently asked at Stack • 172 problems | 23 Easy | 97 Medium | 51 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 76 | Make Array Non-decreasing | Medium | ArrayStackGreedy |
| 77 | Make The String Great | Easy | StringStack |
| 78 | Max Chunks To Make Sorted | Medium | ArrayStackGreedy |
| 79 | Max Chunks To Make Sorted II | Hard | ArrayStackGreedy |
| 80 | Max Stack | Hard | Linked ListStackDesign |
| 81 | Maximal Range That Each Element Is Maximum in It | Medium | ArrayStackMonotonic Stack |
| 82 | Maximal Rectangle | Hard | ArrayDynamic ProgrammingStack |
| 83 | Maximum and Minimum Sums of at Most Size K Subarrays | Hard | ArrayMathStack |
| 84 | Maximum Array Hopping Score I | Medium | ArrayDynamic ProgrammingStack |
| 85 | Maximum Array Hopping Score II | Medium | ArrayStackGreedy |
| 86 | Maximum Binary Tree | Medium | ArrayDivide and ConquerStack |
| 87 | Maximum Elegance of a K-Length Subsequence | Hard | ArrayHash TableStack |
| 88 | Maximum Frequency Score of a Subarray | Hard | ArrayHash TableMath |
| 89 | Maximum Frequency Stack | Hard | Hash TableStackDesign |
| 90 | Maximum Length of Semi-Decreasing Subarrays | Medium | ArrayStackSorting |
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