hdu Buy the Ticket

 import java.math.BigInteger;
 import java.util.*;
 public class Main {
     public static void main(String []args)
     {
         Scanner cin=new Scanner(System.in);
         int n,m,i;
         int t1=0;
         while(cin.hasNextBigInteger())
         {
             t1++;
             m=cin.nextInt();
             n=cin.nextInt();
             if(m==0&&n==0) break;
             System.out.println("Test #"+t1+":");
             if(n>m)
             {
                 System.out.println("0");
             }
             else
             {
                 BigInteger sum=new BigInteger("1");
                 for(i=m+n; i>=1; i--)
                 {
                     BigInteger c1=new BigInteger(((Integer)i).toString());
                     sum=sum.multiply(c1);
                 }
                 int c=(m-n+1);
                 BigInteger m2=new BigInteger(((Integer)(m+1)).toString());
                 BigInteger m1=new BigInteger(((Integer)c).toString());
                 System.out.println(sum.multiply(m1).divide(m2));
             }
         }
     }

 }