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.util.*;

public class main {

    static Scanner sc = new Scanner(System.in);

    public static void main(String[] args) {
        candles();
    }

    static void candles() {
        int a = sc.nextInt();
        int b = sc.nextInt();

        int sum = 0;
        int r = 0;
        while (a > r) {
            sum += a;
            r = a % b;
            a = a / b + r;
            System.out.println(sum);
        }

        System.out.println(sum);
    }
}