cigarettes

描述

Tom has many cigarettes. We hypothesized that he has n cigarettes and smokes them

one by one keeping all the butts. Out of k > 1 butts he can roll a new cigarette.
Now，do you know how many cigarettes can Tom has?

输入

First input is a single line,it’s n and stands for there are n testdata.then there are n lines ,each line contains two integer numbers giving the values of n and k.

输出

For each line of input, output one integer number on a separate line giving the maximum number of cigarettes that Peter can have.

样例输入

3 4 3 10 3 100 5

1 2 3 4

3 4 3 10 3 100 5

样例输出

5 14 124

1 2 3

5 14 124

[cpp]
解题思路:汽水1元/瓶，10个空瓶换一瓶汽水，100元你能喝多少瓶。烟！cigarettes！小学大家都学过把，不过英文实在是菜….
#include “stdio.h”
int main()
{int temp,n,k,sum;
scanf(“%d”,&temp);
while(temp–)
{scanf(“%d%d”,&n,&k);sum=n;
while(n>=k)
{n-=k;sum++;n++;}
printf(“%dn”,sum);}
return 0;
}
[/cpp]