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Maximum Depth of Binary Tree
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.
1 /** 2 * Definition for binary tree 3 * struct TreeNode { 4 * int val; 5 * TreeNode *left; 6 * TreeNode *right; 7 * TreeNode(int x) : val(x), left(NULL), right(NULL) {} 8 * }; 9 */ 10 class Solution { 11 public: 12 int maxDepth(TreeNode *root, int dep = 0) { 13 if(root==NULL) 14 return dep; 15 int ldep = maxDepth(root->left,dep+1); 16 int rdep = maxDepth(root->right,dep+1); 17 return max(ldep,rdep); 18 } 19 };
TIPS:
根节点的深度为1
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