| 128. Longest Consecutive Sequence | | | Solve | Medium | | |
| 130. Surrounded Regions | | | Solve | Medium | | |
| 200. Number of Islands | | | Solve | Medium | | |
| 261. Graph Valid Tree | | | Solve | Medium | | |
| 305. Number of Islands II | | | Solve | Hard | | |
| 323. Number of Connected Components in an Undirected Graph | | | Solve | Medium | | |
| 399. Evaluate Division | | | Solve | Medium | | |
| 547. Number of Provinces | | | Solve | Medium | | |
| 684. Redundant Connection | | | Solve | Medium | | |
| 685. Redundant Connection II | | | Solve | Hard | | |
| 694. Number of Distinct Islands | | | Solve | Medium | | |
| 695. Max Area of Island | | | Solve | Medium | | |
| 711. Number of Distinct Islands II | | | Solve | Hard | | |
| 721. Accounts Merge | | | Solve | Medium | | |
| 737. Sentence Similarity II | | | Solve | Medium | | |
| 765. Couples Holding Hands | | | Solve | Hard | | |
| 778. Swim in Rising Water | | | Solve | Hard | | |
| 785. Is Graph Bipartite? | | | Solve | Medium | | |
| 803. Bricks Falling When Hit | | | Solve | Hard | | |
| 827. Making A Large Island | | | Solve | Hard | | |
| 839. Similar String Groups | | | Solve | Hard | | |
| 886. Possible Bipartition | | | Solve | Medium | | |
| 924. Minimize Malware Spread | | | Solve | Hard | | |
| 928. Minimize Malware Spread II | | | Solve | Hard | | |
| 947. Most Stones Removed with Same Row or Column | | | Solve | Medium | | |
| 952. Largest Component Size by Common Factor | | | Solve | Hard | | |
| 959. Regions Cut By Slashes | | | Solve | Medium | | |
| 990. Satisfiability of Equality Equations | | | Solve | Medium | | |
| 1020. Number of Enclaves | | | Solve | Medium | | |
| 1061. Lexicographically Smallest Equivalent String | | | Solve | Medium | | |
| 1101. The Earliest Moment When Everyone Become Friends | | | Solve | Medium | | |
| 1102. Path With Maximum Minimum Value | | | Solve | Medium | | |
| 1135. Connecting Cities With Minimum Cost | | | Solve | Medium | | |
| 1168. Optimize Water Distribution in a Village | | | Solve | Hard | | |
| 1202. Smallest String With Swaps | | | Solve | Medium | | |
| 1254. Number of Closed Islands | | | Solve | Medium | | |
| 1258. Synonymous Sentences | | | Solve | Medium | | |
| 1267. Count Servers that Communicate | | | Solve | Medium | | |
| 1319. Number of Operations to Make Network Connected | | | Solve | Medium | | |
| 1361. Validate Binary Tree Nodes | | | Solve | Medium | | |
| 1391. Check if There is a Valid Path in a Grid | | | Solve | Medium | | |
| 1489. Find Critical and Pseudo-Critical Edges in Minimum Spanning Tree | | | Solve | Hard | | |
| 1559. Detect Cycles in 2D Grid | | | Solve | Medium | | |
| 1569. Number of Ways to Reorder Array to Get Same BST | | | Solve | Hard | | |
| 1579. Remove Max Number of Edges to Keep Graph Fully Traversable | | | Solve | Hard | | |
| 1584. Min Cost to Connect All Points | | | Solve | Medium | | |
| 1627. Graph Connectivity With Threshold | | | Solve | Hard | | |
| 1631. Path With Minimum Effort | | | Solve | Medium | | |
| 1632. Rank Transform of a Matrix | | | Solve | Hard | | |
| 1697. Checking Existence of Edge Length Limited Paths | | | Solve | Hard | | |
