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.
提交的错误，不知道为什么，但是要自己避免。
C++实现代码：
#include<iostream> #include<new> #include<vector> #include<stack> using namespace std; //Definition for binary tree 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) { if(root->left==NULL&&root->right==NULL) return 1; int leftDepth=maxDepth(root->left); int rightDepth=maxDepth(root->right); return leftDepth>= rightDepth ?(leftDepth+1):(rightDepth+1); } return 0; } void createTree(TreeNode *&root) { int i; cin>>i; if(i!=0) { root=new TreeNode(i); if(root==NULL) return; createTree(root->left); createTree(root->right); } } }; int main() { Solution s; TreeNode *root; s.createTree(root); cout<<s.maxDepth(root); cout<<endl; }
