The Coco-Cola Store

UVA11877

The Coco-Cola Store

 

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). The input terminates with n = 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

0

Sample output

1

5

40

 

题意：

3个空瓶子可以换1瓶可乐，输入告诉你会有多少空瓶子，输出回答可以换到多少可乐

方法一：

使用模拟的方法做：

代码：

 

 

#include"iostream" using namespace std; const int maxn=110; int main() { int ca,n; while(cin>>n&&n) { ca=0; while(n>2) { n-=3; ca++; n+=1; } if(n==2) { ca++; } cout<<ca<<endl; } return 0; }

方法二：
其实只要输出每次的n/2就可以了

代码

#include"iostream" using namespace std; int main() { int n; while(cin>>n&&n) { if(n!=2) cout<<n/2<<endl; else cout<<1<<endl; } return 0; }