[자바] 정올 540 : 반복제어문1 - 자가진단5

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int i;
        Scanner sc = new Scanner(System.in);
        while(true){
            i = sc.nextInt();
            if(i == -1) break;
            if(i % 3 == 0) System.out.println(i/3);
        }
    }
}