题目
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.
/**
* 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) {
}
};
思路
运用递归求树的最大深度。
代码
/**
* 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;
}
int l = 0, r = 0;
if (root -> left != NULL) {
l = maxDepth(root -> left);
}
if (root -> right != NULL) {
r = maxDepth(root -> right);
}
if (r > l) {
return r+1;
} else {
return l+1;
}
}
};
本文介绍了一种使用递归方法求解二叉树最大深度的算法实现。通过检查根节点并递归地计算左子树和右子树的最大深度来确定整棵树的最大深度。
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