| 0797 | All Paths From Source to Target LeetCode XXXX Depth-First Search, Breadth-First Search, Graph, Backtracking | Medium | | |
| 0200 | Number of Islands LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Array, Matrix | Medium | | |
| 0695 | Max Area of Island LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Array, Matrix | Medium | | |
| 0133 | Clone Graph LeetCode XXXX Depth-First Search, Breadth-First Search, Graph, Hash Table | Medium | | |
| 0494 | Target Sum LeetCode XXXX Array, Dynamic Programming, Backtracking | Medium | | |
| 0144 | Binary Tree Preorder Traversal LeetCode XXXX Stack, Tree, Depth-First Search, Binary Tree | Easy | | |
| 0094 | Binary Tree Inorder Traversal LeetCode XXXX Stack, Tree, Depth-First Search, Binary Tree | Easy | | |
| 0145 | Binary Tree Postorder Traversal LeetCode XXXX Stack, Tree, Depth-First Search, Binary Tree | Easy | | |
| 0589 | N-ary Tree Preorder Traversal LeetCode XXXX Stack, Tree, Depth-First Search | Easy | | |
| 0590 | N-ary Tree Postorder Traversal LeetCode XXXX Stack, Tree, Depth-First Search | Easy | | |
| 0124 | Binary Tree Maximum Path Sum LeetCode XXXX Tree, Depth-First Search, Dynamic Programming, Binary Tree | Hard | | |
| 0199 | Binary Tree Right Side View LeetCode XXXX Tree, Depth-First Search, Breadth-First Search, Binary Tree | Medium | | |
| 0543 | Diameter of Binary Tree LeetCode XXXX Tree, Depth-First Search, Binary Tree | Easy | | |
| 0662 | Maximum Width of Binary Tree LeetCode XXXX Tree, Depth-First Search, Breadth-First Search, Binary Tree | Medium | | |
| 0958 | Check Completeness of a Binary Tree LeetCode XXXX Tree, Breadth-First Search, Binary Tree | Medium | | |
| 0572 | Subtree of Another Tree | | Tree, Depth-First Search, Binary Tree, String Matching, Hash Function | Easy |
| 0100 | Same Tree LeetCode XXXX Tree, Depth-First Search, Breadth-First Search, Binary Tree | Easy | | |
| 0111 | Minimum Depth of Binary Tree LeetCode XXXX Tree, Depth-First Search, Breadth-First Search, Binary Tree | Easy | | |
| 0841 | Keys and Rooms LeetCode XXXX Depth-First Search, Breadth-First Search, Graph | Medium | | |
| 0129 | Sum Root to Leaf Numbers LeetCode XXXX Tree, Depth-First Search, Binary Tree | Medium | | |
| 0323 | Number of Connected Components in an Undirected Graph LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Graph | Medium | | |
| 0684 | Redundant Connection LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Graph | Medium | | |
| 0802 | Find Eventual Safe States LeetCode XXXX Depth-First Search, Breadth-First Search, Graph, Topological Sort | Medium | | |
| 0785 | Is Graph Bipartite? LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Graph | Medium | | |
| 0886 | Possible Bipartition LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Graph | Medium | | |
| 0323 | Number of Connected Components in an Undirected Graph LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Graph | Medium | | |
| 0130 | Surrounded Regions LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Array, Matrix | Medium | | |
| 0417 | Pacific Atlantic Water Flow LeetCode XXXX Depth-First Search, Breadth-First Search, Array, Matrix | Medium | | |
| 1020 | Number of Enclaves LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Array, Matrix | Medium | | |
| 1254 | Number of Closed Islands LeetCode XXXX Depth-First Search, Breadth-First Search, Union Find, Array, Matrix | Medium | | |
| 1034 | Coloring A Border LeetCode XXXX Depth-First Search, Breadth-First Search, Array, Matrix | Medium | | |
| 0529 | Minesweeper | | Depth-First Search, Breadth-First Search, Array, Matrix | Medium |