| 133. Clone Graph | Solution | Solve | Medium | | |
| 207. Course Schedule | Solution | Solve | Medium | | |
| 210. Course Schedule II | Solution | Solve | Medium | | |
| 261. Graph Valid Tree | Solution | Solve | Medium | | |
| 269. Alien Dictionary | Solution | Solve | Hard | | |
| 277. Find the Celebrity | Solution | Solve | Medium | | |
| 310. Minimum Height Trees | Solution | Solve | Medium | | |
| 323. Number of Connected Components in an Undirected Graph | Solution | Solve | Medium | | |
| 329. Longest Increasing Path in a Matrix | Solution | Solve | Hard | | |
| 332. Reconstruct Itinerary | Solution | Solve | Hard | | |
| 399. Evaluate Division | Solution | Solve | Medium | | |
| 444. Sequence Reconstruction | Solution | Solve | Medium | | |
| 499. The Maze III | Solution | Solve | Hard | | |
| 505. The Maze II | Solution | Solve | Medium | | |
| 547. Number of Provinces | Solution | Solve | Medium | | |
| 631. Design Excel Sum Formula | Solution | Solve | Hard | | |
| 684. Redundant Connection | Solution | Solve | Medium | | |
| 685. Redundant Connection II | Solution | Solve | Hard | | |
| 743. Network Delay Time | Solution | Solve | Medium | | |
| 753. Cracking the Safe | Solution | Solve | Hard | | |
| 765. Couples Holding Hands | Solution | Solve | Hard | | |
| 785. Is Graph Bipartite? | Solution | Solve | Medium | | |
| 787. Cheapest Flights Within K Stops | Solution | Solve | Medium | | |
| 797. All Paths From Source to Target | Solution | Solve | Medium | | |
| 802. Find Eventual Safe States | Solution | Solve | Medium | | |
| 834. Sum of Distances in Tree | Solution | Solve | Hard | | |
| 841. Keys and Rooms | Solution | Solve | Medium | | |
| 847. Shortest Path Visiting All Nodes | Solution | Solve | Hard | | |
| 851. Loud and Rich | Solution | Solve | Medium | | |
| 882. Reachable Nodes In Subdivided Graph | Solution | Solve | Hard | - | |
| 886. Possible Bipartition | Solution | Solve | Medium | | |
| 913. Cat and Mouse | Solution | Solve | Hard | | |
| 924. Minimize Malware Spread | Solution | Solve | Hard | | |
| 928. Minimize Malware Spread II | Solution | Solve | Hard | | |
| 947. Most Stones Removed with Same Row or Column | Solution | Solve | Medium | | |
| 990. Satisfiability of Equality Equations | Solution | Solve | Medium | | |
| 997. Find the Town Judge | Solution | Solve | Easy | | |
| 1042. Flower Planting With No Adjacent | Solution | Solve | Medium | - | |
| 1059. All Paths from Source Lead to Destination | Solution | Solve | Medium | | |
| 1129. Shortest Path with Alternating Colors | Solution | Solve | Medium | | |
| 1135. Connecting Cities With Minimum Cost | Solution | Solve | Medium | | |
| 1136. Parallel Courses | Solution | Solve | Medium | | |
| 1168. Optimize Water Distribution in a Village | Solution | Solve | Hard | | |
| 1192. Critical Connections in a Network | Solution | Solve | Hard | | |
| 1203. Sort Items by Groups Respecting Dependencies | Solution | Solve | Hard | | |
| 1245. Tree Diameter | Solution | Solve | Medium | | |
| 1298. Maximum Candies You Can Get from Boxes | Solution | Solve | Hard | | |
| 1311. Get Watched Videos by Your Friends | Solution | Solve | Medium | | |
| 1319. Number of Operations to Make Network Connected | Solution | Solve | Medium | | |
| 1334. Find the City With the Smallest Number of Neighbors at a Threshold Distance | Solution | Solve | Medium | | |
