题解 | #汽水瓶#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        int[] n = new int[10];
        Scanner in = new Scanner(System.in);
        int i = 0;
        //n[i] = in.nextInt();
        while(true){
            n[i] = in.nextInt();
            if(n[i]==0){
                break;
            }
            i++;
        }
        int[] n1 = new int[i];
        for(int j = 0;j<i; j++){
            int cnt = 0;
            while(n[j]>1){
                n[j] = n[j]-3+1;
                cnt++;
            }
            n1[j] = cnt;
            System.out.println(n1[j]);
        }
       
    }   
}