题解 | #二叉树#

import java.util.*;
public class Main{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        while(sc.hasNextInt()){
            int n=sc.nextInt();
            if(n==0){
                break;
            }else{
                System.out.println(n/2);
            }
        }
    }
}