Package g0101_0200.s0111_minimum_depth_of_binary_tree

Class Solution

java.lang.Object
g0101_0200.s0111_minimum_depth_of_binary_tree.Solution
public class Solution extends Object
111 - Minimum Depth of Binary Tree.

Easy

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 1:

Input: root = [3,9,20,null,null,15,7]

Output: 2

Example 2:

Input: root = [2,null,3,null,4,null,5,null,6]

Output: 5

Constraints:

  • The number of nodes in the tree is in the range [0, 105].
  • -1000 <= Node.val <= 1000

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • minDepth

      public int minDepth(TreeNode root)