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
样例输出
5
14
124

 1 #include <stdio.h> 
 2 
 3 int main(){
 4     int T;
 5     int n;
 6     int k;
 7     int amount;
 8     int temp;
 9     
10     scanf("%d",&T);
11     
12     while(T--){
13         scanf("%d%d",&n,&k);
14         
15         amount=0;
16         temp=n;
17         while(1){
18             if(temp>=k){
19                 amount++;
20                 temp-=k;
21                 temp++;
22             }
23             else
24                 break;
25         }
26         
27         printf("%d
",amount+n);
28     }
29     
30     return 0;
31 }