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LeetCode 104. Maximum Depth of Binary Tree(二叉树深度)

时间:2019-06-05 16:34:43      阅读:88      评论:0      收藏:0      [点我收藏+]

Given a binary tree, find its maximum depth.

The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.

Note: A leaf is a node with no children.

Example:

Given binary tree [3,9,20,null,null,15,7],

    3
   /   9  20
    /     15   7

return its depth = 3.

/**
 * Definition for a binary tree node.
 * struct TreeNode {
 *     int val;
 *     TreeNode *left;
 *     TreeNode *right;
 *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
 * };
 */
class Solution {
public:
    int maxDepth(TreeNode* root) {
        if (root == NULL) return 0;
        
        return max(maxDepth(root->left), maxDepth(root->right)) + 1;
    }
};

 

LeetCode 104. Maximum Depth of Binary Tree(二叉树深度)

原文:https://www.cnblogs.com/douzujun/p/10980303.html

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