import . "nc_tools"
/*
* type TreeNode struct {
* Val int
* Left *TreeNode
* Right *TreeNode
* }
*/
/**
*
* @param root TreeNode类
* @return int整型
*/
//递归选手请求出战
func maxDepth( root *TreeNode ) int {
// write code here
return maxD(root)
}
func maxD(root *TreeNode) int {
if root == nil {
return 0
}
var res int
left := maxD(root.Left)
right := maxD(root.Right)
res = max(left, right) + 1
return res
}
func max(a, b int) int {
if a < b {
return b
}
return a
}