HDU 5832 A water problem

8.14日网络赛第1题

题目：点击打开链接

Description

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

There is 



 days
in Xixi a year and 





 days
in Haha a year. 

Now you know the days 

 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 

 huge
test cases). 

For each test, we have a line with an only integer 











,
the length of 

 is
up to 















.

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

直接一位一位地算

我们队伍的代码：

#include<cstdio>
#include<cstdlib>
#include<cstring>
#define N 10000001
char str[N];
int len;
int i;
int mod;
long long ans;
int ca;
int main()
{
mod = 10001;
while(scanf("%s", str) != EOF)
{
ca++;
ans = 0;
len = strlen(str);
for(i = 0; i < len; i++)ans = (ans * 10 + str[i]-'0') % mod;
if(ans == 0) printf("Case #%d: YES\n", ca);
else printf("Case #%d: NO\n", ca);
}
return 0;
}

虽然很慢，但是AC了