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
0
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=0; while(scanf("%d",&n)==1&&n) { if(n<3) {cout<<0<<endl; continue; } while(n>0) {n-=3; i++; n++; } i+=n; cout<<i<<endl; i=0; } return 0; }