HDU 5832 A water problem

A water problem

Time Limit: 5000/2500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 595    Accepted Submission(s): 308

Problem Description

Two planets named Haha and Xixi in the universe and they were created with the universe beginning.

There is 73 days in Xixi a year and 137 days in Haha a year. 

Now you know the days N after Big Bang, you need to answer whether it is the first day in a year about the two planets.

 

Input

There are several test cases(about 5 huge test cases).

For each test, we have a line with an only integer N(0≤N), the length of N is up to 10000000.

 

Output

For the i-th test case, output Case #i: , then output "YES" or "NO" for the answer.

 

Sample Input

10001 0 333

 

Sample Output

Case #1: YES

Case #2: YES

Case #3: NO

 

Author

UESTC

 

Source

2016中国大学生程序设计竞赛 - 网络选拔赛

 

 

 

解析：大数取模。给你一个数，问这个数是否能同时整除73和137。而73和137均为素数，也就是判断这个数能否整除10001。

 

 

 

#include <cstdio>

const int MAXN = 10000000+5;
char s[MAXN];

int main()
{
    int cn = 0;
    while(~scanf("%s", s)){
        int mod = 0;
        for(int i = 0; s[i] != ''; ++i){
            mod = (mod*10+s[i]-'0')%10001;
        }
        if(mod == 0)
            printf("Case #%d: YES
", ++cn);
        else
            printf("Case #%d: NO
", ++cn);
    }
    return 0;
}