汽水瓶-题解（C语言代码）

解题思路:

注意事项:

参考代码:

#include<stdio.h>

int main()

{

    int a,n,m;

    while(scanf("%d",&a)){

        if (a == 0) {

            break;

        }

        n = a / 3;

        a = a % 3;

        m = n + a;

        while (m >= 3) {

            n = n + m / 3;

            m = m / 3 + m % 3;

        }

        if (m == 2) {

            n++;

            }

        printf("%d\n", n);

        n = 0;

    }

    return 0;

}