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.util.Scanner;

public class Candles {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String[] inp = sc.nextLine().split(" ");
        int a = Integer.valueOf(inp[0]);
        int b = Integer.valueOf(inp[1]);

        int total = a;

        if (a >= b) {
            int min = Math.min(a, b);

            while (a >= min) {
                total += a/b;
                a = (a / b) + (a % b);
            }
        } else {        
            System.out.println(a);
        }

        System.out.println(total);
    }

}
