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minDepthOfBinaryTree.java

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minDepthOfBinaryTree.java

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/**

* Definition for a binary tree node.

* public class TreeNode {

* int val;

* TreeNode left;

* TreeNode right;

* TreeNode(int x) { val = x; }

* }

*/

public class Solution {

public int minDepth(TreeNode root) {

if(root==null)

{

return 0;

}

if(root.left==null) return(minDepth(root.right)+1);

if(root.right==null) return (minDepth(root.left)+1);

return ( Math.min(minDepth(root.left),minDepth(root.right))+1);

}

}