Work out the bottle problem

解题思路:

注意题目给的信息，空杯子是3的倍数，就对获得的空杯子进行取余直到为2或0

注意事项:
时间的开销，当小于2时直接退出

参考代码:

#include<stdio.h>

int main()

{

int n = 1;

int a = 0;

while(1)

{

scanf("%d",&n);

if(n == 0 )

{

return 0;

}

int b;

int c = 1;

while(n)

{

if(n >= 2)

{

b = n / 3;

a += b;

c = n - 3*b + b;

n = c;

if(n == 2 )

{

a ++;

break;

}

}

else

break;

}

printf("%d\n",a);

a = 0;

}

}