CodeForces - 669D——(思维题)
Little Artem is fond of dancing. Most of all dances Artem likes rueda — Cuban dance that is danced by pairs of boys and girls forming a circle and dancing together.
More detailed, there are n pairs of boys and girls standing in a circle. Initially, boy number 1 dances with a girl number 1, boy number 2 dances with a girl number 2and so on. Girls are numbered in the clockwise order. During the dance different moves are announced and all pairs perform this moves. While performing moves boys move along the circle, while girls always stay at their initial position. For the purpose of this problem we consider two different types of moves:
- Value x and some direction are announced, and all boys move x positions in the corresponding direction.
- Boys dancing with even-indexed girls swap positions with boys who are dancing with odd-indexed girls. That is the one who was dancing with the girl 1 swaps with the one who was dancing with the girl number 2, while the one who was dancing with girl number 3 swaps with the one who was dancing with the girl number 4 and so one. It's guaranteed that n is even.
Your task is to determine the final position of each boy.
Input
The first line of the input contains two integers n and q (2 ≤ n ≤ 1 000 000, 1 ≤ q ≤ 2 000 000) — the number of couples in the rueda and the number of commands to perform, respectively. It's guaranteed that n is even.
Next q lines contain the descriptions of the commands. Each command has type as the integer 1 or 2 first. Command of the first type is given as x ( - n ≤ x ≤ n), where 0 ≤ x ≤ n means all boys moves x girls in clockwise direction, while - x means all boys move x positions in counter-clockwise direction. There is no other input for commands of the second type.
Output
Output n integers, the i-th of them should be equal to the index of boy the i-th girl is dancing with after performing all q moves.
Examples
6 3
1 2
2
1 2
4 3 6 5 2 1
2 3
1 1
2
1 -2
1 2
4 2
2
1 3
1 4 3 2 题意:有n对男女围成一个圈跳舞,初始状态时,按顺时针给他们标上1-n号,男生1号和女生1号跳舞,男生2号和女生2号.....男生n号和女生n号。然后就下来有2种操作,操作1是所有男生移动 i 个位置,若 i 为负数,则向顺时针移动i个位置;
否则,操作2是相邻的两个男生交换位置。在所有操作中,牛生是不动的。问,在一系列操作之后,女生1-n对应的男生分别是多少号。 思路:在移动的过程中,一个数左右的数虽然在不断的改变,但是可以发现一点,所有奇数的相对位置不会改变,所有偶数的相对位置不会改变。
因为如果是移动一定的位置,是不会改变所有数的相对位置的;而如果是交换,则奇数之间是同步交换的,而偶数之间也是同步交换的。
所以,不管如何操作,一个奇数左边的第一个奇数和右边的第一个奇数都是不会改变的,偶数也是如此。(即相对位置没有改变)。
所以,这题的解法就明了了:我们可以记录下数字1和2的位置,开始时,数字1就在第一位,数字2就在第二位,若他们移动,标记也跟着移动。
确定了1和2的位置之后,就能推出所有数的位置了。 代码:
#include<iostream>
#include<cstring>
#include<cstdio>
#include<string>
#include<cmath>
#include<algorithm>
#include<stack>
#include<queue>
#define eps 1e-7
#define ll long long
#define inf 0x3f3f3f3f
#define pi 3.141592653589793238462643383279
using namespace std;
int ans[];
int main()
{
int n,m,oper,far;
while(cin>>n>>m)
{
int sum = ;
int flag1 = ,flag2 = ; //flag1标记1的位置(初始在第一个位置 0),flag2标记2的位置(初始在第二个位置1)
for(int i=; i<m; ++i)
{
scanf("%d",&oper);
if(oper == ) //如果是操作1,表示是平移
{
scanf("%d",&far);
flag1 += far; //标记也平移
flag2 += far;
flag1 = (flag1%n + n)%n; //为防止超过范围,要进行取模
flag2 = (flag2%n + n)%n;
}
else //操作2是交换
{
if(flag1%==) flag1++; //若 1 在偶数位置,则说明是和右边的交换
else flag1--; //否则和左边交换(下标从 0 开始) if(flag2%==) flag2++; // 2 同理
else flag2--; flag1 = (flag1%n + n)%n; //取模防越界
flag2 = (flag2%n + n)%n;
}
}
for(int i=; i<n; i+=) //根据1,2的位置推出所有数的位置
{
ans[(flag1+i)%n] = i+;
ans[(flag2+i)%n] = i+;
}
for(int i=; i<n; ++i)
printf("%d%c",ans[i],i==n-?'\n':' ');
}
return ;
}
CodeForces - 669D——(思维题)的更多相关文章
- Codeforces 424A (思维题)
Squats Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit Statu ...
- Vova and Trophies CodeForces - 1082B(思维题)
Vova has won nn trophies in different competitions. Each trophy is either golden or silver. The trop ...
- CodeForces - 417B (思维题)
Crash Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit Status ...
- CodeForces - 417A(思维题)
Elimination Time Limit: 1000MS Memory Limit: 262144KB 64bit IO Format: %I64d & %I64u Submit ...
- B - Sonya and Exhibition CodeForces - 1004B (思维题)
B. Sonya and Exhibition time limit per test 1 second memory limit per test 256 megabytes input stand ...
- codeforces ~ 1009 B Minimum Ternary String(超级恶心的思维题
http://codeforces.com/problemset/problem/1009/B B. Minimum Ternary String time limit per test 1 seco ...
- 贪心/思维题 Codeforces Round #310 (Div. 2) C. Case of Matryoshkas
题目传送门 /* 题意:套娃娃,可以套一个单独的娃娃,或者把最后面的娃娃取出,最后使得0-1-2-...-(n-1),问最少要几步 贪心/思维题:娃娃的状态:取出+套上(2),套上(1), 已套上(0 ...
- C. Nice Garland Codeforces Round #535 (Div. 3) 思维题
C. Nice Garland time limit per test 1 second memory limit per test 256 megabytes input standard inpu ...
- CodeForces - 631C ——(思维题)
Each month Blake gets the report containing main economic indicators of the company "Blake Tech ...
- CodeForces - 1102A(思维题)
https://vjudge.net/problem/2135388/origin Describe You are given an integer sequence 1,2,-,n. You ha ...
随机推荐
- VB中Excel 2010的导入导出操作
VB中Excel 2010的导入导出操作 编写人:左丘文 2015-4-11 近来这已是第二篇在讨论VB的相关问题,今天在这里,我想与大家一起分享一下在VB中如何从Excel中导入数据和导出数据到Ex ...
- Android中如何使用JUnit进行单元测试 eclipse
Android中如何使用JUnit进行单元测试 在我们日常开发android app的时候,需要不断地进行测试,所以使用JUnit测试框架显得格外重要,学会JUnit可以加快应用的开发周期. Andr ...
- 测试用例文件的存放和创建,对page objeck的理解
如:(注意我下面这种要用eval函数取拼接的)
- MU-MIMO学习
设备的认证查询 https://www.wi-fi.org/product-finder 1. MU-MIMO不会增大无线的最大速度 2. MU-MIMO需要路由器和客户端同时支持 3. 当你没有或者 ...
- 【POJ】3378 Crazy Thairs(树状数组+dp+高精)
题目 传送门:QWQ 分析 题意:给个数列,求有多少五元上升组 考虑简化一下问题:如果题目求二元上升组怎么做. 仿照一下逆序对,用树状数组维护一下就ok了. 三元怎么做呢? 把二元的拓展一位就可以了, ...
- RPM包下载网址
https://pkgs.org/ (最爱) http://rpm.pbone.net/ http://rpmfind.net/linux/RPM/index.html
- selenium+python自动化81-html报告优化(饼图+失败重跑+兼容python2&3)
优化html报告 为了满足小伙伴的各种变态需求,为了装逼提升逼格,为了让报告更加高大上,测试报告做了以下优化: 测试报告中文显示,优化一些断言失败正文乱码问题 新增错误和失败截图,展示到html报告里 ...
- ASP.NET web 应用程序项目
ASP.NET web 应用程序项目 .ashx .ashx.cs aspx包括前台一些代码要处理,ashx可以看作是没有aspx页面中前台代码的后台.cs文件. 没有了前台代码,服务器负担少一点, ...
- How to Integrate JCaptcha in Spring Security
The repository for JCaptcha is this one: <repository> <id>sourceforge-releases</id> ...
- sqlserver: 使用While 示例
declare @i intset @i = 1999while(@i<2009)begin declare @sql varchar(8000) set @sql = 'update d ...