| 133 | Clone Graphread | — | Medium | Hash TableDepth-First SearchBreadth-First Search | 62% | |
| 207 | Course Scheduleread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 49% | |
| 210 | Course Schedule IIread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 53% | |
| 261 | Graph Valid Tree | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 49% | |
| 269 | Alien Dictionary | — | Hard | ArrayStringDepth-First Search | 37% | |
| 310 | Minimum Height Trees | — | Medium | Depth-First SearchBreadth-First SearchGraph | 42% | |
| 323 | Number of Connected Components in an Undirected Graphread | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 64% | |
| 329 | Longest Increasing Path in a Matrix | — | Hard | ArrayDynamic ProgrammingDepth-First Search | 55% | |
| 332 | Reconstruct Itinerary | — | Hard | Depth-First SearchGraphEulerian Circuit | 44% | |
| 399 | Evaluate Divisionread | — | Medium | ArrayStringDepth-First Search | 63% | |
| 547 | Number of Provinces | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 68% | |
| 684 | Redundant Connectionread | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 66% | |
| 685 | Redundant Connection IIread | — | Hard | Depth-First SearchBreadth-First SearchUnion Find | 35% | |
| 743 | Network Delay Timeread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 57% | |
| 753 | Cracking the Safe | — | Hard | Depth-First SearchGraphEulerian Circuit | 58% | |
| 765 | Couples Holding Handsread | — | Hard | GreedyDepth-First SearchBreadth-First Search | 58% | |
| 785 | Is Graph Bipartite?read | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 58% | |
| 787 | Cheapest Flights Within K Stopsread | — | Medium | Dynamic ProgrammingDepth-First SearchBreadth-First Search | 40% | |
| 797 | All Paths From Source to Target | — | Medium | BacktrackingDepth-First SearchBreadth-First Search | 83% | |
| 802 | Find Eventual Safe Statesread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 68% | |
| 834 | Sum of Distances in Treeread | — | Hard | Dynamic ProgrammingTreeDepth-First Search | 65% | |
| 841 | Keys and Rooms | — | Medium | Depth-First SearchBreadth-First SearchGraph | 75% | |
| 847 | Shortest Path Visiting All Nodes | — | Hard | Dynamic ProgrammingBit ManipulationBreadth-First Search | 65% | |
| 851 | Loud and Richread | — | Medium | ArrayDepth-First SearchGraph | 61% | |
| 882 | Reachable Nodes In Subdivided Graphread | — | Hard | GraphHeap (Priority Queue)Shortest Path | 51% | |
| 886 | Possible Bipartitionread | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 51% | |
| 913 | Cat and Mouseread | — | Hard | MathDynamic ProgrammingGraph | 34% | |
| 924 | Minimize Malware Spreadread | — | Hard | ArrayHash TableDepth-First Search | 42% | |
| 928 | Minimize Malware Spread IIread | — | Hard | ArrayHash TableDepth-First Search | 45% | |
| 947 | Most Stones Removed with Same Row or Column | — | Medium | Hash TableDepth-First SearchUnion Find | 62% | |
| 990 | Satisfiability of Equality Equations | — | Medium | ArrayStringUnion Find | 51% | |
| 997 | Find the Town Judgeread | — | Easy | ArrayHash TableGraph | 50% | |
| 1042 | Flower Planting With No Adjacentread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 52% | |
| 1129 | Shortest Path with Alternating Colorsread | — | Medium | Breadth-First SearchGraph | 47% | |
| 1192 | Critical Connections in a Networkread | — | Hard | Depth-First SearchGraphBiconnected Component | 58% | |
| 1203 | Sort Items by Groups Respecting Dependenciesread | — | Hard | Depth-First SearchBreadth-First SearchGraph | 66% | |
| 1298 | Maximum Candies You Can Get from Boxes | — | Hard | ArrayBreadth-First SearchGraph | 57% | |
| 1311 | Get Watched Videos by Your Friendsread | — | Medium | ArrayHash TableBreadth-First Search | 50% | |
| 1319 | Number of Operations to Make Network Connectedread | — | Medium | Depth-First SearchBreadth-First SearchUnion Find | 64% | |
| 1334 | Find the City With the Smallest Number of Neighbors at a Threshold Distanceread | — | Medium | Dynamic ProgrammingGraphShortest Path | 70% | |
| 1361 | Validate Binary Tree Nodesread | — | Medium | TreeDepth-First SearchBreadth-First Search | 44% | |
| 1368 | Minimum Cost to Make at Least One Valid Path in a Gridread | — | Hard | ArrayBreadth-First SearchGraph | 71% | |
| 1377 | Frog Position After T Seconds | — | Hard | TreeDepth-First SearchBreadth-First Search | 36% | |
| 1462 | Course Schedule IVread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 60% | |
| 1466 | Reorder Routes to Make All Paths Lead to the City Zeroread | — | Medium | Depth-First SearchBreadth-First SearchGraph | 65% | |
| 1489 | Find Critical and Pseudo-Critical Edges in Minimum Spanning Treeread | — | Hard | Union FindGraphSorting | 66% | |
| 1494 | Parallel Courses IIread | — | Hard | Dynamic ProgrammingBit ManipulationGraph | 29% | |
| 1514 | Path with Maximum Probabilityread | — | Medium | ArrayGraphHeap (Priority Queue) | 65% | |
| 1557 | Minimum Number of Vertices to Reach All Nodesread | — | Medium | Graph | 81% | |
| 1579 | Remove Max Number of Edges to Keep Graph Fully Traversableread | — | Hard | Union FindGraph | 70% | |