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. 分析: 要得出二叉树中全部从根到叶子节点路径中,经过结点最少路径上的节点数. 採用二叉树的层序遍历思想.每遍历一层.高度加一,仅仅要遇到叶子节点,就终止,并返回当前层数.
七.Playbook1.语法特性如下:(1)"---"首行顶格开始(2)#号注释(3)缩进统一,不同的缩进代表不同的级别,缩进要对齐,空格和tab不能混用(4)区别大小写,键值对k/v的值也大小写敏感(5)k/v的值同行使用":"分开,换行写需以"-"分隔2.格式---- name: test hosts: test gather_facts: no vars: http: 8080 https: 1443 vars_file
You want to build a house on an empty land which reaches all buildings in the shortest amount of distance. You can only move up, down, left and right. You are given a 2D grid of values 0, 1 or 2, where: Each 0 marks an empty land which you can pass b
Follow up for problem "Populating Next Right Pointers in Each Node". What if the given tree could be any binary tree? Would your previous solution still work? Note: You may only use constant extra space. For example,Given the following binary tr
题目描述: Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For example:Given binary tree {3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its bottom-up level or
1. Definiation What is Binary Trees? Collection of node (n>=0) and in which no node can have more than two children. 或为空集,或为有一个根节点和两棵互不相交的二叉树组成 左子树与右子树是有顺序的,不能颠倒 即使是只有一颗子树也要分清是左子树还是右子树 2. property (1) 若二叉树的层次从1开始,则在二叉树的第i 层最多有2^(i-1)个结点: (2)高度为k 的二叉