题解 | #HJ022 汽水瓶#

import java.util.Scanner;

/**
 * HJ22 汽水瓶
 */
public class HJ022 {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        while (sc.hasNextInt()) {
            int bottle = sc.nextInt();
            if (bottle == 0) {
                break;
            }
            System.out.println(bottle / 2);
        }
        sc.close();
    }

}