The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. dfs的简洁版本: 1classSolution {2private:3intmind;4public:5intminDepth(TreeNode *root) {6if(root == NULL)return0;7if(root->left == NULL)returnminDepth(root->right) +...
* TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */classSolution{public:intmaxDepth(TreeNode* root){if(!root)return0; queue<TreeNode*> qt;intmax=0;intpreNodeCount=1;intnodeCount=0; qt.push(root);while(qt.size()!=0){ TreeNode* tn=qt.front(); preNodeCount--...
LeetCode Maximum Depth of Binary Tree (求树的深度),题意:给一棵二叉树,求其深度。思路:递归比较简洁,先求左子树深度,再求右子树深度,比较其结果,返回:max_one+1。1/**2*Definitionforabinarytreenode.3*structTreeNode{4*intval;5...
【Leetcode】Minimum Depth of Binary Tree 题目链接:https://leetcode.com/problems/minimum-depth-of-binary-tree/ 题目: Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node....
*/publicclassSolution{public intmaxDepth(TreeNode root){returnroot==null?0:1+Math.max(maxDepth(root.left),maxDepth(root.right));}} 一行解决问题。 fuck. 也就只能在简单题里面装个逼了 Anyway, Good luck, Richardo! DFS recursion My code: ...
https://leetcode.com/problems/maximum-depth-of-n-ary-tree/ 简化版:https://leetcode.com/problems/maximum-depth-of-binary-tree/ 此后约定:存进Queue 或者Stack的对象一定不能是null。 非递归方法:实际上是BFS按层级遍历; 递归方法: 2.1 套用分层遍历:保留每一层的最大深度,而不是每个数量; ...
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】 【递归】 时间复杂度为O(n) 空间复杂度为O(logn) /** * Definition for binary tree ...
Leetcode 543. Diameter of Binary Tree 题目描述:找出二叉树的最长直径(也就是所以节点连成最长的路径长度) 题目链接:Leetcode 543. Diameter of Binary Tree 题目思路:用到的就是经典的递归返回值的形式,不断返回左子树和右子树的深度,然后过程中更新最长的路径。 代码如下 参考链接 543. Diameter of Binary Tr...
Given the root of a binary tree, return its maximum depth.A binary tree's maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node. 英文版地址 leetcode.com/problems/m 中文版描述 给定一个二叉树,找出其最大深度。二叉树的深度为根节点到...
LeetCode 111 题,Minimum Depth of Binary Tree 解题思路 1、读题,求解二叉树的最小Depth。 2、用bfs 去解决,队列带上每层的层数。当有一个节点的左右子树都为空时,返回当前层数,就找到解。 Python 代码 # De…