#binary_tree #tree #bfs
Title: 103. Binary Tree Zigzag Level Order Traversal
URL: leetcode
Level: Medium

#binary_tree #tree #bfs
Title: 102. Binary Tree Level Order Traversal
URL: leetcode
Level: Medium

#binary_tree #tree #bfs
Title: 111. Minimum Depth of Binary Tree
URL: leetcode
Level: Easy

version2 with #bfs