Soution of 10346 - Peter's Smokes

Problem Description
source:https://uva.onlinejudge.org/external/103/10346.html

Peter has n cigarettes. He smokes them one by one keeping all the butts. Out of k > 1 butts he can roll a new cigarette. 
         How many cigarettes can Peter have? 

Input 

Input is a sequence of lines. Each line contains two integer numbers giving the values of n and k. The input is terminated by end of file. 

Output 

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

Sample Input 

4 3 
10 3 
100 5 

Sample Output 

5 
14 
124

Solution:

#include<stdio.h>
 int main()
{
   long int n,k,result,get;
   while(scanf("%ld%ld",&n,&k)==2)
   {
      result=0;
      result=n+n/k;
      get=n/k+n%k;
       while(get>=k)
       {
          result=result+get/k;
          get=get/k+get%k;
       }    
       printf("%ld\n",result);
  }
   return(0);
}