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.
解题思路:使用递归思路,求最大的左子树和最大的右子树的最大。
java版:
public class Solution {
public int maxDepth(TreeNode root) {
if(root==null) return 0;
else
return Math.max(maxDepth(root.left),maxDepth(root.right))+1;
}
}
c++版:
class Solution {
public:
int maxDepth(TreeNode* root) {
if(root==NULL)
return 0;
else
return max(maxDepth(root->left),maxDepth(root->right))+1;
}
};