publicintminDepth(TreeNode root) {if(root ==null)return0;intdepth =1;//The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node.LinkedList<TreeNode> queue =newLinkedList<TreeNode>(); queue.add(root);intcurnum =1;intnextnum =0...
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. dfs的简洁版本: 1classSolution {2private:3intmind;4public:5intminDepth(TreeNode *root) {6if(root == NULL)return0;7if(root-...
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…
* int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: int minDepth(TreeNode *root) { if(root==NULL) return 0; int mleft=minDepth(root->left); int mright=minDepth(root->right); if(m...
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. Note: A leaf is a node with no children. Example: Given binary tree [3,9,20,null,null,15,7], ...
时间限制:1秒 空间限制:32768K 题目描述 Given a binary tree, find its minimum depth.The minimum depth ...
1 这种题还是得遍历完整个树才行,我总想着边走就边得到这个值了 2 root等于None的时候,是直接return,并不是返回-1 3 root值是global smallest 4 二叉树有时需要写一个子函数 5 因为有个全局最小,那就设置一个全局最大,每次更新那个全局最大数,直到traverse完所有的节点...
LeetCode笔记:111. Minimum Depth of Binary Tree 问题: 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. 大意: 给出一个二叉树,找到他最小的深度。 最小的深度是指从根节点到叶子...
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 ...
Can you solve this real interview question? Minimum Depth of Binary Tree - 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. Note: A leaf is a