import java.util.*;
public class Demo{
    public static void main(String[] args) {
            int i = 0;
            Scanner input =new Scanner (System.in);
            for( ; ; ) {
            System.out.print("請輸入一個大於0的數:");
            int number=input.nextInt(); 
                i = i + number;
            if
 
(number==0) {
                System.out.println(i);
                break;
               }
            }
    }
}