111.minimum depth of binary tree(E)
111. minimum depth of binary tree
111. minimum depth of binary tree Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. Note: A leaf is a node with no children. Example: Given binary tree [3,9,20,null,null,15,7], 3 / 9 20 / 15 7 return its minimum depth = 2.
111.minimum depth of binary tree(E)
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111.minimum depth of binary tree(E)
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LeetCode111：Minimum Depth of Binary Tree
Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest