Tag: a-dfs

All the articles with the tag "a-dfs".

• LeetCode 98 Validate Binary Search Tree

  13 Jun, 2026

  Solutions for LeetCode 98, medium, tags: tree, depth-first search, binary search tree, binary tree.

• LeetCode 297 Serialize and Deserialize Binary Tree

  11 Jun, 2026

  Solutions for LeetCode 297, hard, tags: string, tree, binary tree, design, dfs, bfs.

• LeetCode 102 Binary Tree Level Order Traversal

  10 Jun, 2026

  Solutions for LeetCode 102, medium, tags: tree, breadth-first search, depth-first search, binary tree.

• LeetCode 684 Redundant Connection

  8 Jun, 2026

  Solutions for LeetCode 684, medium, tags: tree, union find, graph, depth-first search.

• LeetCode 114 Flatten Binary Tree to Linked List

  4 Jun, 2026

  Solutions for LeetCode 114, medium, tags: tree, depth-first search, linked list, stack, binary tree.

• LeetCode 236 Lowest Common Ancestor of a Binary Tree

  4 Jun, 2026

  Solutions for LeetCode 236, medium, tags: tree, dfs, binary tree.