题解 | #汽水瓶#

import java.util.*; 
import java.io.*;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        String str;

        ArrayList<Integer> list = new ArrayList<Integer>();

        while((str = br.readLine()) != null){
            int n = Integer.parseInt(str);
            if(n == 0) break;
            list.add(n/2);
        }
        list.forEach(System.out :: println);
    } 
}