题解 | #汽水瓶#

他很穷，每次都和老板借汽水喝，相当于两个空瓶即可喝一瓶汽水

int main(void)
{
    int num;
    int gas_num = 0;
    while(scanf("%d", &num) != EOF)
    {
        gas_num = 0;
        if(num > 0)
        {
           printf("%d\n", num/2);
        }
    }
    
    return 0;
}