A. Flipping Game     time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Iahub got bored, so he invented a game to be played on paper. He writes n integers a1, a2, ..., an. Each of those intege…

Flipping Game time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Iahub got bored, so he invented a game to be played on paper. He writes n integers a1, a2, ..., an. Each of those integers can…

Strange Billboard 题目链接: http://acm.hust.edu.cn/vjudge/contest/129733#problem/A Description The marketing and public-relations department of the Czech Technical University has designed a new reconfigurable mechanical Flip-Flop Bill-Board (FFBB). The b…

Flipping Game time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Iahub got bored, so he invented a game to be played on paper. He writes n integers a1, a2, ..., an. Each of those integers can…

The Water Bowls Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 7402 Accepted: 2927 Description The cows have a line of 20 water bowls from which they drink. The bowls can be either right-side-up (properly oriented to serve refreshing cool…

A. Flipping Game time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Iahub got bored, so he invented a game to be played on paper. He writes n integers a1, a2, ..., an. Each of those integers c…

ZOJ - 4114 Flipping Game 题目大意:给出两个串s,t,n个灯泡的序列,1代表开着,0代表关着,一共操作k轮,每轮改变m个灯泡的状态,问最终能把s串变成t串的方案数. 坤神题解. 很奇特的一种dp,首先状态的定义dp[i][j]是前i轮操作后,有j个灯泡的状态跟最终串不一样的方案数.这样初始化是dp[0][num]=1其他全0,num是s串和t串状态不同的灯泡数目.然后状态的转移,对于每一轮我们枚举有j个灯泡跟最终串状态不一样,然后再枚举上一轮有kk个灯泡与最终串状态不一样…

//: Playground - noun: a place where people can play import UIKit var str = "Hello, playground" enum Movement { case Left case Right case Top case Bottom } let aMovement = Movement.Left switch aMovement { case .Left: print("left") defa…

建议88:用枚举实现工厂方法模式更简洁 工厂方法模式(Factory Method Pattern)是" 创建对象的接口,让子类决定实例化哪一个类,并使一个类的实例化延迟到其它子类".工厂方法模式在我们的开发中经常会用到.下面以汽车制造为例,看看一般的工厂方法模式是如何实现的,代码如下: //抽象产品 interface Car{ } //具体产品类 class FordCar implements Car{ } //具体产品类 class BuickCar implements Ca…

假设我们需要表示网络连接状态,可以用下列枚举表示: enum CSConnectionState { CSConnectionStateDisconnected, CSConnectionStateConnecting, CSConnectionStateConnected, }; 然而定义枚举变量的方式却太不简介,要依如些语法编写: enum CSConnectionState state = CSConnectionStateDisconnected; 若是每次不用敲入 enum 而只需写…