hdu 2067 小兔的棋盘 卡特兰数+java

import java.math.BigInteger;
import java.util.Scanner;

public class Main{

public static void main(String[] args) {
Scanner in=new Scanner(System.in);
int n=0,i=0,cas=0;
BigInteger[] a=new BigInteger[50];
a[0]=BigInteger.ONE;
for(i=1;i<=36;i++)
{
a[i]=a[i-1].multiply(BigInteger.valueOf(4*i-2)).divide(BigInteger.valueOf(i+1));
a[i-1]=a[i-1].multiply(BigInteger.valueOf(2));
}
while(in.hasNextInt())
{
n=in.nextInt();
if(n==-1) break;
cas++;
System.out.print(cas+" "+n+" ");
System.out.println(a
);
}
in.close();
}

}