题解 | #汽水瓶#

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        while(sc.hasNextInt()){
            int num = sc.nextInt();
            if(num == 0){
                break;
            }
            //多模拟几组数据即可看出这个规律
            System.out.println(num/2);
        }
    }
}