Depth-First Search

236. 二叉树的最近公共祖先

Medium | Tree, Depth-First Search, Binary Tree

Easy | String, Backtracking, Tree, Depth-First Search, Binary Tree

Hard | String, Tree, Depth-First Search, Breadth-First Search, Design, Binary Tree

Medium | Depth-First Search, Breadth-First Search, Graph Theory, Topological Sort

Medium | Array, String, Backtracking, Depth-First Search, Matrix

Easy | Stack, Tree, Depth-First Search, Binary Tree

Medium | Tree, Depth-First Search, Binary Search Tree, Binary Tree

Medium | Tree, Depth-First Search, Binary Search Tree, Binary Tree