The minimum depth is the number of nodes along the shortest path from the root node down to the nearest leaf node. Have you been asked this question in an interview? /** * Definition for binary tree * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNod...
与Minimum Depth of Binary Tree对照看 解法一:递归,子树高度+1。 /** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * };*/classSolution {public:intmaxDepth(TreeNode *roo...
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…
class Solution(object): def lowestCommonAncestor(self, root, p, q): """ :type root: TreeNode :type p: TreeNode :type q: TreeNode :rtype: TreeNode """ pathP, pathQ = self.findpath(root, p), self.findpath(root, q) if pathP and pathQ: length = min(len(pathQ), len(path...
* 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); ...
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...
Can you solve this real interview question? Lowest Common Ancestor of a Binary Tree - Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia [https://en.wikipedia.org/wi
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia:“The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q as descendants (where we allow...
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