[leetcode]_Minimum Depth of Binary Tree

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[leetcode]_Minimum Depth of Binary Tree

第五道树题,10分钟之内一遍AC.做树题越来越有feel~ 题目:求一棵树从root结点到叶子结点的最短路径. 思路:仍然是递归.如果一个结点的左右子树任意一边为Null,该子树的minDepth应为非null子树的高度+1:如果一个结点的左右子树两边都非Null,则该子树的minDepth应为两个子树的较小值代码: public int minDepth(TreeNode root) { if(root == null) return 0; if(root.left == null &&…

LeetCode:Minimum Depth of Binary Tree,Maximum Depth of Binary Tree

LeetCode: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. 算法1:dfs递归的求解 class Solution { public: int minDepth(T…

LeetCode——Maximum Depth of Binary Tree

LeetCode--Maximum Depth of Binary Tree Question 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. Answer /** * Definition for a binary tree…

[LeetCode] Minimum Depth of Binary Tree 二叉树的最小深度

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. 二叉树的经典问题之最小深度问题就是就最短路径的节点个数,还是用深度优先搜索DFS来完成,万能的递归啊...请看代码: /** * Definition for binary tre…

[LeetCode] Maximum Depth of Binary Tree 二叉树的最大深度

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. 求二叉树的最大深度问题用到深度优先搜索DFS,递归的完美应用,跟求二叉树的最小深度问题原理相同.代码如下: C++ 解法一: class Solution { public: in…

LeetCode: Minimum Depth of Binary Tree 解题报告

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. SOLUTION 1: 递归这种递归解法更简单.因为在本层递归中不需要考虑左右子树是否为NULL的情况.因为我们直接把…

LeetCode - 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. 思路: 递归,注意是到leaf node,所以有一个孩子为空的话,则取非空的那一孩子 package tree; public class MinimumDepthOfBi…

Leetcode 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. 递归求解 int maxDepth(TreeNode *root){ +max(maxDepth(root->left), maxDepth(root->right)) : ;…

Leetcode:Minimus Depth of Binary Tree

The problem description: 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. 这个题目本身不是很难,二叉树的广搜找到最浅的那个子树.但这个题目是比较典型的再广搜的时候需要记录或者使用到当前深度信息,所以我们需…

[Leetcode] Maximum depth of binary tree二叉树的最大深度

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. 方法一: 层次遍历,整棵树的层数,即二叉树的最大深度.主体的代码还是在层次遍历的基础上改成的. /** * Definition for binary tree * struct…