Practice problems across 75+ categories
Practice problems frequently asked at Google • 3407 problems | 851 Easy | 1775 Medium | 761 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 856 | Encode String with Shortest Length | Hard | StringDynamic Programming |
| 857 | Encrypt and Decrypt Strings | Hard | ArrayHash TableString |
| 858 | Equal Rational Numbers | Hard | MathString |
| 859 | Equal Row and Column Pairs | Medium | ArrayHash TableMatrix |
| 860 | Equal Sum Arrays With Minimum Number of Operations | Medium | ArrayHash TableGreedy |
| 861 | Equal Sum Grid Partition I | Medium | ArrayMatrixEnumeration |
| 862 | Equal Tree Partition | Medium | TreeDepth-First SearchBinary Tree |
| 863 | Equalize Strings by Adding or Removing Characters at Ends | Medium | StringBinary SearchDynamic Programming |
| 864 | Erect the Fence | Hard | ArrayMathGeometry |
| 865 | Erect the Fence II | Hard | ArrayMathGeometry |
| 866 | Escape a Large Maze | Hard | ArrayHash TableDepth-First Search |
| 867 | Escape The Ghosts | Medium | ArrayMath |
| 868 | Evaluate Boolean Binary Tree | Easy | TreeDepth-First SearchBinary Tree |
| 869 | Evaluate Boolean Expression | Medium | Database |
| 870 | Evaluate Division | Medium | ArrayStringDepth-First Search |
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