Graphs - BFS/DFS
Total Problems: 15
Completed: 15 (100%)
📚 Pattern Master Notes
Graphs - BFS/DFS - Complete Guide
This comprehensive guide includes: - 🧠 Pattern recognition & problem-solving mindset - 🎯 Sub-patterns and variations - 🏆 Golden templates and code examples - ⚠️ Common pitfalls and debugging tips - 📊 Decision trees and quick reference tables
💡 Tip: Read the notes before starting problems to build intuition!
Progress by Difficulty
| Difficulty | Total | Completed | Remaining | Percentage |
|---|---|---|---|---|
| 🟢 Easy | 2 | 2 | 0 | 100% |
| 🟡 Medium | 10 | 10 | 0 | 100% |
| 🔴 Hard | 3 | 3 | 0 | 100% |
Problems
| # | Problem | Difficulty | Status | Confidence |
|---|---|---|---|---|
| 168 | Number of Islands | E | ✅ | HGH |
| 169 | Flood Fill | E | ✅ | HGH |
| 170 | Word Ladder | M | ✅ | MED |
| 171 | Surrounded Regions | M | ✅ | HGH |
| 172 | Clone Graph | M | ✅ | MED |
| 173 | Graph Valid Tree | M | ✅ | MED |
| 174 | Walls and Gates | M | ✅ | MED |
| 175 | Number of Connected Components in an Undirected Graph | M | ✅ | HGH |
| 176 | Pacific Atlantic Water Flow | M | ✅ | LOW |
| 177 | Max Area of Island | M | ✅ | HGH |
| 178 | Keys and Rooms | M | ✅ | HGH |
| 179 | Find if Path Exists in Graph | M | ✅ | HGH |
| 180 | Word Ladder II | H | ✅ | LOW |
| 181 | Alien Dictionary | H | ✅ | LOW |
| 182 | Minimum Knight Moves | H | ✅ | MED |
Last Updated: 2026-02-13 19:40:00
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