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
0
333
Sample Output
Case #1: YES
Case #2: YES
Case #3: NO
Author
UESTC
Source
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] != '\0'; ++i){
mod = (mod*10+s[i]-'0')%10001;
}
if(mod == 0)
printf("Case #%d: YES\n", ++cn);
else
printf("Case #%d: NO\n", ++cn);
}
return 0;
}