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53 lines (45 loc) · 978 Bytes
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/**
* Maximum Depth of Binary Tree
*
* cpselvis([email protected])
* September 4th, 2016
*/
#include<iostream>
using namespace std;
struct TreeNode {
int val;
TreeNode *left;
TreeNode *right;
TreeNode(int x) : val(x), left(NULL), right(NULL) {}
};
class Solution {
public:
int ret = 0;
int maxDepth(TreeNode* root) {
dfs(root, 0);
return ret;
}
void dfs(TreeNode * root, int n)
{
if (root != NULL)
{
n ++;
ret = n > ret ? n : ret;
dfs(root -> left, n);
dfs(root -> right, n);
}
}
};
int main(int argc, char **argv)
{
TreeNode *root = new TreeNode(1);
root -> left = new TreeNode(0);
root -> right = new TreeNode(1);
root -> left -> left = new TreeNode(0);
root -> left -> right = new TreeNode(1);
root -> right -> left = new TreeNode(0);
root -> right -> right = new TreeNode(1);
root -> right -> left -> left = new TreeNode(0);
Solution s;
cout << s.maxDepth(root) << endl;
}