Practice problems across 75+ categories
Practice problems frequently asked at Monotonic Stack • 68 problems | 2 Easy | 40 Medium | 26 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 46 | Next Greater Element IV | Hard | ArrayBinary SearchStack |
| 47 | Next Greater Node In Linked List | Medium | ArrayLinked ListStack |
| 48 | Number of People That Can Be Seen in a Grid | Medium | ArrayStackMatrix |
| 49 | Number of Valid Subarrays | Hard | ArrayStackMonotonic Stack |
| 50 | Number of Visible People in a Queue | Hard | ArrayStackMonotonic Stack |
| 51 | Odd Even Jump | Hard | ArrayDynamic ProgrammingStack |
| 52 | Online Stock Span | Medium | StackDesignMonotonic Stack |
| 53 | Remove Duplicate Letters | Medium | StringStackGreedy |
| 54 | Remove K Digits | Medium | StringStackGreedy |
| 55 | Remove Nodes From Linked List | Medium | Linked ListStackRecursion |
| 56 | Shortest Subarray to be Removed to Make Array Sorted | Medium | ArrayTwo PointersBinary Search |
| 57 | Shortest Unsorted Continuous Subarray | Medium | ArrayTwo PointersStack |
| 58 | Smallest K-Length Subsequence With Occurrences of a Letter | Hard | StringStackGreedy |
| 59 | Smallest Subarray to Sort in Every Sliding Window | Medium | ArrayTwo PointersStack |
| 60 | Smallest Subsequence of Distinct Characters | Medium | StringStackGreedy |
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