Lucid
6 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2603. Collect Coins in a Tree | Hard | 100% | TopicsArrayTreeGraph TheoryTopological Sort |
| 1742. Maximum Number of Balls in a Box | Easy | 100% | TopicsHash TableMathCounting |
| 20. Valid Parentheses | Easy | 78% | TopicsStringStackBracket Sequences |
| 200. Number of Islands | Medium | 78% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 155. Min Stack | Medium | 68.9% | TopicsStackDesign |
| Lowest Common Ancestor of a Binary Tree | Medium | 68.9% | TopicsTreeDepth-First SearchBinary TreeBinary LiftingLowest Common Ancestor |
