Poj Solution 2000

http://poj.org/problem?id=2000

import java.util.*;   
  
public class Main {   
  
    public static void main(String[] args) {   
        Scanner cin = new Scanner(System.in);   
           
        while(true)   
        {   
            int day = Integer.valueOf(cin.nextLine()).intValue();   
            if(day == 0)   
                break;   
               
            System.out.println(day + " " + getTotalCoin(day));   
        }   
    }   
       
    private static int getTotalCoin(int day)   
    {   
        int total = 1;   
        int factor = 2;   
        int index = 0;   
           
        if(day == 1)   
            return 1;   
           
        for(int i = 2; i <= day; i++)   
        {   
            if(index == factor)   
            {   
                index = 0;   
                factor ++;   
            }   
               
            total += factor;   
            index ++;   
        }      
        return total;   
    }   
}