Stack Coding Problems
LIFO data structure operations
172
Total Problems
23
Easy
97
Medium
51
Hard
Practice problems across 75+ categories
Practice problems frequently asked at Stack • 172 problems | 23 Easy | 97 Medium | 51 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1 | 132 Pattern | Medium | ArrayBinary SearchStack |
| 2 | Accounts Merge | Medium | StackSegment Tree |
| 3 | Add Two Numbers II | Medium | Linked ListMathStack |
| 4 | Apply Operations to Maximize Score | Hard | ArrayMathStack |
| 5 | Asteroid Collision | Medium | ArrayStackSimulation |
| 6 | Backspace String Compare | Easy | Two PointersStringStack |
| 7 | Baseball Game | Easy | ArrayStackSimulation |
| 8 | Basic Calculator | Hard | MathStringStack |
| 9 | Basic Calculator II | Medium | MathStringStack |
| 10 | Basic Calculator III | Hard | MathStringStack |
| 11 | Basic Calculator IV | Hard | Hash TableMathString |
| 12 | Beautiful Towers I | Medium | ArrayStackMonotonic Stack |
| 13 | Beautiful Towers II | Medium | ArrayStackMonotonic Stack |
| 14 | Binary Search Tree Iterator | Medium | StackTreeDesign |
| 15 | Binary Search Tree Iterator II | Medium | StackTreeDesign |
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