UVA – 10346 – Peter’s Smokes

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = 0, k = 0, ans, butt = 0;
        while (in.hasNext()) {
            n = ans = butt = in.nextInt();
            k = in.nextInt();
            while ((n =butt/k) > 0) {
                ans+= n;
                butt = butt%k + n;
            }
            System.out.println(ans);
        }

    }
}
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