Computer Programming Contest Preparation

    1 import java.util.Scanner;
    2 import java.math.BigInteger;
    3 
    4 class a424
    5 {
    6     public static void main(String[] args)
    7     {
    8         BigInteger sum = BigInteger.valueOf(0);
    9         BigInteger zero = BigInteger.valueOf(0);
   10         Scanner sc = new Scanner(System.in);
   11         while(true)
   12             {
   13                 BigInteger V = sc.nextBigInteger();
   14                 if(V.equals(zero)) break;
   15                 sum = sum.add(V);
   16             }
   17         System.out.println(sum);
   18     }
   19 }
   20