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#yyds干货盘点# LeetCode 腾讯精选练习 50 题：二叉树的最大深度
source link: https://blog.51cto.com/u_13321676/5820704
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#yyds干货盘点# LeetCode 腾讯精选练习 50 题：二叉树的最大深度
精选 原创给定一个二叉树，找出其最大深度。
二叉树的深度为根节点到最远叶子节点的最长路径上的节点数。
说明: 叶子节点是指没有子节点的节点。
给定二叉树 [3,9,20,null,null,15,7]，
返回它的最大深度 3 。
代码实现：
class Solution {
public int maxDepth(TreeNode root) {
if (root == null) {
return 0;
} else {
int leftHeight = maxDepth(root.left);
int rightHeight = maxDepth(root.right);
return Math.max(leftHeight, rightHeight) + 1;
}
}
}
public int maxDepth(TreeNode root) {
if (root == null) {
return 0;
} else {
int leftHeight = maxDepth(root.left);
int rightHeight = maxDepth(root.right);
return Math.max(leftHeight, rightHeight) + 1;
}
}
}
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