HDU 5832 A water problem

#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<vector>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<iostream>
using namespace std;
typedef long long LL;
const double pi=acos(-1.0),eps=1e-8;
void File()
{
    freopen("D:\\in.txt","r",stdin);
    freopen("D:\\out.txt","w",stdout);
}
template <class T>
inline void read(T &x)
{
    char c = getchar(); x = 0;while(!isdigit(c)) c = getchar();
    while(isdigit(c)) { x = x * 10 + c - ‘0‘; c = getchar();  }
}

const int maxn=10000010;
char s[maxn];

int main()
{
    int cas=1;
    while(~scanf("%s",s))
    {
        int p1=0,p2=0;
        for(int i=0;s[i];i++)
        {
            p1=(p1*10+s[i]-‘0‘)%73;
            p2=(p2*10+s[i]-‘0‘)%137;
        }
        int ans=1; if(p1==0&&p2==0) ans=1; else ans=0;
        printf("Case #%d: ",cas++);
        if(ans) printf("YES\n"); else printf("NO\n");
    }
    return 0;
}