[leetcode]_Maximum Depth of Binary Tree

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[leetcode]_Maximum Depth of Binary Tree

第三道树的题目,我还是不会,我擦,怎么递归算法还是不能很好理解.看来还得好好研究下递归算法. 题目:求一棵树的最大深度. 思路:递归地求取左子树最大深度和右子树最大深度,返回较大值即为整棵树的最大深度. 代码: public int maxDepth(TreeNode root) { if(root == null) return 0; int leftHeight = 1,rightHeight = 1; if(root.left != null) leftHeight += maxD…

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…