495 - Fibonacci Freeze

/***

            Bismillahir Rahmanir Rahim
            Read the name of Allah, who created you!!!
            Author : Shah Newaj Rabbi Shishir
            Department of CSE, City University, Bangladesh.

***/

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

public class Main
{
public static void main (String[] args)
{
Scanner in = new Scanner (System.in);

int n,i;

while (in.hasNext())
{
n = in.nextInt();

BigInteger a = BigInteger.valueOf(1),b=a,sum;

if (n == 0)
System.out.println ("The Fibonacci number for 0 is 0");
else
{
for (i=1; i<=n; i++)
{
if (i == n)
System.out.println ("The Fibonacci number for " +n+ " is " +a);

sum = a.add(b);
a = b;
b = sum;
}
}
}
}
}