hdu Buy the Ticket

 1 import java.math.BigInteger;
 2 import java.util.*;
 3 public class Main {
 4     public static void main(String []args)
 5     {
 6         Scanner cin=new Scanner(System.in);
 7         int n,m,i;
 8         int t1=0;
 9         while(cin.hasNextBigInteger())
10         {
11             t1++;
12             m=cin.nextInt();
13             n=cin.nextInt();
14             if(m==0&&n==0) break;
15             System.out.println("Test #"+t1+":");
16             if(n>m)
17             {
18                 System.out.println("0");
19             }
20             else
21             {
22                 BigInteger sum=new BigInteger("1");
23                 for(i=m+n; i>=1; i--)
24                 {
25                     BigInteger c1=new BigInteger(((Integer)i).toString());
26                     sum=sum.multiply(c1);
27                 }
28                 int c=(m-n+1);
29                 BigInteger m2=new BigInteger(((Integer)(m+1)).toString());
30                 BigInteger m1=new BigInteger(((Integer)c).toString());
31                 System.out.println(sum.multiply(m1).divide(m2));
32             }
33         }
34     }
35 
36 }