题意:判断有向图两点之间是否可通达! 解法:深搜或广搜(注意避免旧路重行) DFS: #include<iostream> #include<vector> #include<string.h> using namespace std; struct Road{ int From; int Dest; bool Vist; Road(int f,int d,bool v){ From = f; Dest = d; Vist = v; } }; vector<Roa…

1155. Can I Post the letter Constraints Time Limit: 1 secs, Memory Limit: 32 MB Description I am a traveler. I want to post a letter to Merlin. But because there are so many roads I can walk through, and maybe I can't go to Merlin's house following t…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

题目描述 将中缀表达式(infix expression)转换为后缀表达式(postfix expression).假设中缀表达式中的操作数均以单个英文字母表示,且其中只包含左括号'(',右括号‘)’和双目算术操作符+,-,*,/. 输入格式 第一行是测试样例个数n.以下n行,每行是表示中缀表达式的一个字符串(其中只包含操作数和操作符和左右括号,不包含任何其他字符),长度不超过100个字符. 输出格式 为每一个测试样例单独一行输出对应后缀表达式字符串(其中只包含操作数和操作符,不包含任何其他字符…

题目: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae"…

起因:从一段代码说起 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Test { class Program { static void Main(string[] args) { string temp = "1610MM001A衫片"; foreach (Char item in…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input: Digit string "23" Output: ["ad", "ae", &…

Description 你有一些小球,从左到右依次编号为1,2,3,...,n. 你可以执行两种指令(1或者2).其中, 1 X Y表示把小球X移动到小球Y的左边, 2 X Y表示把小球X移动到小球Y右边. 指令保证合法,即X不等于Y. 例如,初始状态1,2,3,4,5,6的小球执行1 1 4后,小球1被移动到小球4的左边,即2,3,1,4,5,6.如果再执行2 3 5,结点3将会移到5的右边,即2,1,4,5,3,6. Input 第一行为一个整数t(0<t<10),表示测试用例个数.每个测…

问题: Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephone buttons) is given below.Example:Input:Digit string "23"Output: ["ad", "ae&…

SCI/EI期刊投稿Reply Letter常用格式总结          整个论文投稿的过程中,会遇到各种问题,需要我们向主编询问或是回复.下面主要总结了responses to the comments,以及催稿信的模板.   1.回复信(Response Letter)       在期刊投稿中,首次录用的比例相对较小,大部分的文章都会进行小修或是大修.如果是大修的话,就需要好好的修改文章,并认真的回复审稿人的意见.审稿人的意见一般都是比较有价值的. 1)常用格式: Dear Editor…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Notice Although the above answer is in lexicographical order, your answe…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outpu…

1 题目: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae&quo…

敬爱的GitHub” —— 致GitHub的一封地下信 英文原文:"Dear GitHub…" An Open Letter to GitHub 最近,一个由开源名目(包含一些最盛行的名目)保护者组成的集团逐步强大起来.该集团联署了一封致 GitHub 的地下信,以表白他们的挫折感以及他们的埋怨——他们觉得受到了 GitHub 的疏忽和疏忽.几天内,签订者的个数就增添到了数百(不过偏心地说,其中一些显著是“假的签订者”).其中包含 jQuery.React Native.node.js…

Letter Combinations of a Phone Number Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Outpu…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. 解题思路: 思路一: 使用DFS算法,JAVA实现如下: static String[] alpha = new String[] { " &q…

1155. Troubleduons Time limit: 0.5 secondMemory limit: 64 MB Archangel of the Science is reporting:“O, Lord! Those physicists on the Earth have discovered a new elementary particle!”“No problem, we’ll add another parameter to the General Equation of…

题目链接: http://poj.org/problem?id=1155 题目大意:电视台转播节目.对于每个根,其子结点可能是用户,也可能是中转站.但是用户肯定是叶子结点.传到中转站或是用户都要花钱,如果是用户,则还可以收钱.问在不亏本的前提下最多能有多少个用户看到节目. 解题思路: 比较麻烦的树形背包.首先cost=1. 花的钱权在边,收的钱权在点,且是叶子结点.所以首先可以对叶子结点进行预处理. 用dp[i][j]表示在i点时传播j个用户(包含自身),则dp[n-m-1~n][1]=每个用户…

$xl = New-Object -ComObject "Excel.Application" $cmdbwb = $xl.Workbooks.Open("F:\Ivan\HZCMDB.xlsx") $cmdbws = $cmdbwb.Worksheets.Item("02--Laptop") $row = Read-Host -Prompt "请输入Excel最左侧的行标" $details = [pscustomobjec…

A letter to our daughter 扎克伯格写给女儿的信   Mark Zuckerberg·Tuesday, December 1, 2015 Dear Max, 亲爱的玛克斯 Your mother and I don't yet have the words to describe the hope you give us for the future. Your new life is full of promise, and we hope you will be hap…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

FJNU 1155 Fat Brother’s prediction(胖哥的预言) Time Limit: 1000MS   Memory Limit: 257792K [Description] [题目描述] Fat Brother is a famous prophet, One day he get a prediction that disaster will come after X days. He is too nervous that sudden die. Fortunatel…

Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae", &q…

题目链接:http://poj.org/problem?id=1155 题目大意:电视台要广播电视节目,要经过中转机构,到观众.从电视台到中转商到观众是一个树形结构,经过一条边需要支付成本.现在给你每两个节点之间传播的成本,给你每个观众会付的钱,问你电视台在不亏本的情况下最多能给多少个观众看节目. 这是我的第一道树形dp..无耻的看了题解.. 设计状态:dp[u][i]代表以u为根的子树中有i个观众,能够得到的最大收入. 状态转移:dp[u][i] = max(dp[u][i],dp[u][i-…

题目: 思路:设置两个List,一个存储当前层,一个存储最终层 public class Solution { public List<String> letterCombinations(String digits) { List<String> listRet=new ArrayList<String>(); if(digits==""){ return listRet; } Map<Character,String> map=new…

A suspect sent a threatening letter in Naver Line App to Richman, and said that he wanted those money wired to a specified account "3398-239775-07". Richman replied to him "What the hell?"..Richman thought that it's a joke or something…

http://acm.hdu.edu.cn/showproblem.php?pid=1155 Bungee Jumping Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 811    Accepted Submission(s): 349 Problem Description Once again, James Bond is fle…

题意: Given a digit string, return all possible letter combinations that the number could represent. A mapping of digit to letters (just like on the telephone buttons) is given below. Input:Digit string "23" Output: ["ad", "ae"…