5 3
 1000 3
 777 17
 4 3
 2 2
 100 4
 10 4
 999 2
 6 4
 1 2
 17 3
 1 4
 26 8
 91 5
 1 3
 1000 2
 20 3
 9 4
 123 5
 1000 1000
 3 2
 3 3
 80 970
 1000 4
 1 1000

7
 1499
 825
 5
 3
 133
 13
 1997
 7
 1
 25
 1
 29
 113
 1
 1999
 29
 11
 153
 1001
 5
 4
 80
 1333
 1

import java.io.*;
import java.lang.*;
 public class NewYearCandle
{
public static void main(String args[]) throws IOException
{
InputStreamReader isr = new InputStreamReader(System.in);
BufferedReader stdin = new BufferedReader(isr);

System.out.print("Enter to values: a b : \n");

int a,b,x,y;
String inputstring = null;
;
inputstring = stdin.readLine();
String[] split = inputstring.split(" ");
 a = Integer.parseInt(split[0]);
 b = Integer.parseInt(split[1]);
x = a;


y = a/b;
x = x + y;

while(y>=b)
{
y =y/b;
x = x + y;
}
System.out.println(x);

}
}