HDU1212 大数膜

#include<cstdio>
#include<cstdlib>
#include<iostream>
#include<algorithm>
#include<memory.h>
#include<cstring>
#include<string> 
using namespace std;
string s;
long long  Mod;
int main()
{
    int i;
    while(cin>>s>>Mod){
        long long ans=0,p=1;
        int L=s.length()-1;
        for(i=0;i<=L;i++){
            ans=(ans*10+s[i]-'0')%Mod;
        }
        cout<<ans<<endl;
    }
    return 0;
}