UVa 10346 - Peter's Smokes

#include<bits/stdc++.h>

using namespace std;

int main()
{
 int n,k,temp,sum;
 
 while(cin>>n>>k)
 {
  temp=n;
  while(n>=k)
  {
   temp=temp+(n/k);
   n=n/k + (n%k);
  }
  cout<<temp<<endl;
 }
}