题解 | 买橘子

#include <stdio.h>
int calcu(int n, int count)
{
    if (n == 0)
        return count;
    else if (n < 0)
        return -1;
    else
    {
        if (n % 8 == 0)
           return count + (n / 8);
        else
        {
            int res = calcu(n - 6, count + 1);
            return res;
        }
    }
}
int main()
{
    int n = 0;
    scanf("%d", &n);
    int ret = calcu(n, 0);
    printf("%d", ret);
    return 0;
}