Once upon a time, there is a special coco-cola store. If you return three empty bottles to the shop,
you’ll get a full bottle of coco-cola to drink. If you have n empty bottles right in your hand, how many
full bottles of coco-cola can you drink?
Input
There will be at most 10 test cases, each containing a single line with an integer
n
(1<=n<=100). Theinput terminates withn= 0, which should not be processed.
Output
For each test case, print the number of full bottles of coco-cola that you can drink.
Spoiler
Let me tell you how to drink 5 full bottles with 10 empty bottles: get 3 full bottles with 9 empty
bottles, drink them to get 3 empty bottles, and again get a full bottle from them. Now you have 2
empty bottles.
Borrow another empty bottle from the shop
, then get another full bottle. Drink it, and
finally return this empty bottle to the shop!
Sample Input
3
10
81
Sample Output
1
5
40
程序分析：此题的大概意思就是3空汽水瓶子可以换一瓶汽水，但是值得注意的就是每3个空瓶子得1瓶汽水，但同时也会多得到一个空瓶子。
程序代码：
#include<cstdio>
#include<iostream>
using namespace std;
int main()
{int T,n,i=;
while(scanf("%d",&n)==&&n)
{
if(n<)
{cout<<<<endl;
continue;
} while(n>)
{n-=;
i++;
n++;
}
i+=n;
cout<<i<<endl;
i=;
}
return ;
}