codeforces451C
Predict Outcome of the Game
There are n games in a football tournament. Three teams are participating in it. Currently k games had already been played.
You are an avid football fan, but recently you missed the whole k games. Fortunately, you remember a guess of your friend for these k games. Your friend did not tell exact number of wins of each team, instead he thought that absolute difference between number of wins of first and second team will be d1 and that of between second and third team will be d2.
You don't want any of team win the tournament, that is each team should have the same number of wins after n games. That's why you want to know: does there exist a valid tournament satisfying the friend's guess such that no team will win this tournament?
Note that outcome of a match can not be a draw, it has to be either win or loss.
Input
The first line of the input contains a single integer corresponding to number of test cases t (1 ≤ t ≤ 105).
Each of the next t lines will contain four space-separated integers n, k, d1, d2 (1 ≤ n ≤ 1012; 0 ≤ k ≤ n; 0 ≤ d1, d2 ≤ k) — data for the current test case.
Output
For each test case, output a single line containing either "yes" if it is possible to have no winner of tournament, or "no" otherwise (without quotes).
Examples
5
3 0 0 0
3 3 0 0
6 4 1 0
6 3 3 0
3 3 3 2
yes
yes
yes
no
no
Note
Sample 1. There has not been any match up to now (k = 0, d1 = 0, d2 = 0). If there will be three matches (1-2, 2-3, 3-1) and each team wins once, then at the end each team will have 1 win.
Sample 2. You missed all the games (k = 3). As d1 = 0 and d2 = 0, and there is a way to play three games with no winner of tournament (described in the previous sample), the answer is "yes".
Sample 3. You missed 4 matches, and d1 = 1, d2 = 0. These four matches can be: 1-2 (win 2), 1-3 (win 3), 1-2 (win 1), 1-3 (win 1). Currently the first team has 2 wins, the second team has 1 win, the third team has 1 win. Two remaining matches can be: 1-2 (win 2), 1-3 (win 3). In the end all the teams have equal number of wins (2 wins).
sol:大力分类讨论四种情况,要及其仔细,否则会挂的很惨。。。

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
inline ll read()
{
ll s=;
bool f=;
char ch=' ';
while(!isdigit(ch))
{
f|=(ch=='-'); ch=getchar();
}
while(isdigit(ch))
{
s=(s<<)+(s<<)+(ch^); ch=getchar();
}
return (f)?(-s):(s);
}
#define R(x) x=read()
inline void write(ll x)
{
if(x<)
{
putchar('-'); x=-x;
}
if(x<)
{
putchar(x+''); return;
}
write(x/);
putchar((x%)+'');
return;
}
#define W(x) write(x),putchar(' ')
#define Wl(x) write(x),putchar('\n')
ll T,n,m,d1,d2;
#define PYES {puts("yes"); continue;}
#define PNO {puts("no"); continue;}
int main()
{
R(T);
while(T--)
{
R(n); R(m); R(d1); R(d2);
if(n%) PNO;
ll tmp=n/,oo;
if(max(d1,d2)>tmp) PNO
if(d1>=d2) //0,d1,d1-d2
{
oo=m-d1-d1+d2;
if((d1+oo/)<=tmp&&oo>=&&oo%==) PYES
}
else //d2-d1,d2,0
{
oo=m-d2-d2+d1;
if((d2+oo/)<=tmp&&oo>=&&oo%==) PYES
}
oo=m-d1-d2; //d1,0,d2
if((max(d1,d2)+oo/)<=tmp&&oo>=&&oo%==) PYES
oo=m-d1-d2-d2; //d1+d2,d2,0
if((d1+d2+oo/)<=tmp&&oo>=&&oo%==) PYES
oo=m-d1-d1-d2; //0,d1,d1+d2
if((d1+d2+oo/)<=tmp&&oo>=&&oo%==) PYES
PNO
}
return ;
}
/*
Input
8
3 0 0 0
3 3 0 0
6 4 1 0
6 3 3 0
3 3 3 2
3 1 1 1
9 4 1 2
3 3 1 1
Output
yes
yes
yes
no
no
yes
yes
no
*/
codeforces451C的更多相关文章
随机推荐
- 01-html介绍和head标签
[转]01-html介绍和head标签 主要内容 web标准 浏览器介绍 开发工具介绍 HTML介绍 HTML颜色介绍 HTML规范 HTML结构详解 一.web标准 web准备介绍: w3c:万维网 ...
- 12月16日广州.NET俱乐部下午4点爬白云山活动
正如我们在<广州.NET微软技术俱乐部与其他技术群的区别>和<广州.NET微软技术俱乐部每周三五晚周日下午爬白云山活动>里面提到的, 我们会在每周三五晚和周日下午爬白云山. ...
- 从.Net到Java学习第一篇——开篇
以前我常说,公司用什么技术我就学什么.可是对于java,我曾经一度以为“学java是不可能的,这辈子不可能学java的.”结果,一遇到公司转java,我就不得不跑路了,于是乎,回头一看N家公司交过社保 ...
- HTTP长连接--Keep-Alive
一.HTTP/1.0 HTTP1.0版本的Keep-alive并不像HTTP1.1那样是默认发送的,所以要想连接得到保持,必须手动配置发送connection:keep-alive字段.若想断开kee ...
- 使用Connector/C++(VS2015)连接MySQL的完整例子
完整示例代码1 /* Copyright 2008, 2010, Oracle and/or its affiliates. All rights reserved. This program is ...
- ADOConnection断线重连
问题: ADOConnection断线重连问题描述: 使用ADOConnection连接oracle数据库,开始正常,当网络断开时数据库连接失败(此时查询ADOConnection.connected ...
- 常用SMTP地址
1.QQ邮箱(mail.qq.com) POP3服务器地址:pop.qq.com(端口:110) SMTP服务器地址:smtp.qq.com(端口:25) 2.搜狐邮箱(sohu.com): POP3 ...
- 电信中兴F460光猫sendcmd命令
1.安装xshell后,使用命令行登陆root用户,root用户密码Zte521(湖北地区) 2.查看所有用户密码 sendcmd 1 DB p DevAuthInfo 3.打开网页登陆teleco ...
- Java开发学习心得(一):SSM环境搭建
目录 Java开发学习心得(一):SSM环境搭建 1 SSM框架 1.1 Spring Framework 1.2 Spring MVC Java开发学习心得(一):SSM环境搭建 有一点.NET的开 ...
- 【Python 07】汇率兑换1.0-2(基本元素)
1.Python基本元素 (1)缩进:表示代码层次关系(Python中表示程序框架唯一手段) 1个tab或者4个空格 (2)注释:开发者加入的说明信息,不被执行.一个代码块一个注释. # 单行注释(一 ...