540 : 반복제어문1 - 자가진단5

Java

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