Tag: a-dfs

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

• LeetCode 230 Kth Smallest Element in a BST

  18 Apr, 2026

  Solutions for LeetCode 230, medium, tags: tree, depth-first search, binary search tree, binary tree.

• LeetCode 200 Number of Islands

  10 Apr, 2026

  Solutions for LeetCode 200, medium, tags: array, depth-first search, breadth-first search, union find, matrix.

• LeetCode 631 Design Excel Sum Formula

  4 Apr, 2026

  Solutions for LeetCode 631, hard, tags: design, graph, depth-first search, topological sort.

• LeetCode 721 Accounts Merge

  31 Mar, 2026

  Solutions for LeetCode 721, medium, tags: array, hash table, string, depth-first search, breadth-first search, union find, sorting.

• LeetCode 638 Shopping Offers

  28 Mar, 2026

  Solutions for LeetCode 638, medium, tags: array, dynamic programming, backtracking, bitmask, memoization.

• LeetCode 2415 Reverse Odd Levels of Binary Tree

  18 Dec, 2024

  Solutions for LeetCode 239, hard, tags: array, queue, sliding window, heap, monotonic queue.