1 #include <iostream>
 2 #include <string>
 3 using namespace std;
 4 
 5 int main()
 6 {
 7     string s1;
 8     int y;
 9     while(cin>>s1>>y)
10     {
11         int sum=s1[0]-'0';
12         for(int i=1;i<s1.size();i++)
13         {
14             sum=(sum*10+s1[i]-'0')%y;
15         }
16         cout<<sum<<endl;
17     }
18     return 0;
19 }

 1 import java.util.Scanner;
 2 import java.math.BigInteger;
 3 public class Main {
 4     public static void main(String[] args){
 5         Scanner scn = new Scanner(System.in);
 6         BigInteger bint1,bint2;
 7         while(scn.hasNext()){
 8             bint1 = scn.nextBigInteger();
 9             bint2 = scn.nextBigInteger();
10             System.out.println(bint1.remainder(bint2));
11         }
12         System.exit(0);
13     }
14 }