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