UVA-10220 I Love Big Numbers

import java.util.Scanner;
import java.math.BigInteger;
public class Main {

    public static void main(String[] args) {
        Scanner input=new Scanner(System.in);
        BigInteger f,sum,r;
        int i,n;
        while(input.hasNext())
        {
        n=input.nextInt();
        sum=BigInteger.valueOf(0);
        f=BigInteger.valueOf(1);
        for(i=1;i<=n;i++)
        {
           
            f=f.multiply(BigInteger.valueOf(i));
        }
       
            while(!f.equals(BigInteger.ZERO))
            {
                r=f.mod(BigInteger.valueOf(10));
                sum=sum.add(r);
                f=f.divide(BigInteger.valueOf(10));
               
               
            }
            System.out.println(sum);
       
       
    }
    }

}

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About Ashadullah Shawon

I am Ashadullah Shawon. I am a Software Engineer. I studied Computer Science and Engineering (CSE) at RUET. I Like To Share Knowledge. Learn More: Click Here