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.
代码实现:
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
public class Solution {
public int maxDepth(TreeNode root) {
if(root==null){
return 0;
}
int leftnum=0;
if(root.left!=null){
leftnum=maxDepth(root.left);
}
int rightnum=0;
if(root.right!=null){
rightnum=maxDepth(root.right);
}
if(leftnum>rightnum){
return leftnum+1;
}else{
return rightnum+1;
}
}
}

本文介绍了一种求解二叉树最大深度的算法。通过递归的方式计算左子树和右子树的最大深度,返回两者较大值加一即为整棵树的最大深度。此算法适用于所有二叉树结构。
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