import java.util.*;
/**
public class TreeNode {
int val = 0;
TreeNode left = null;
TreeNode right = null;
public TreeNode(int val) {
this.val = val;
}
}
*/
public class Solution {
// 找树的深度,使用dfs,递归的思想,就是分别从根节点遍历左子树和右子树,来比较左右子树的深度,
public int TreeDepth(TreeNode root) {
if(root == null){
return 0;
}
return Math.max(TreeDepth(root.left),TreeDepth(root.right)) + 1;
}
}



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