UVA 11417 Java

import java.util.*;
import static java.lang.System.*;
 
public class main{
  public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    int num;
    while((num = sc.nextInt()) != 0)
    {
    	int gcd = 0;
    	for(int i = 1; i < num; i++)
    		for(int j = i+1; j <= num; j++)
    		{
    			int num1 = i, num2 = j;
    			while(num2 != 0)
    			{
    				int temp = num2;
    				num2 = num1 % num2;
    				num1 = temp;
    			}
    			gcd += num1;
    		}
    	System.out.println(gcd);
    }
  }
};