import java.util.Scanner;

public class Yuki257 {

    int MOD = 1000000007;


    public Yuki257() {
        Scanner scanner = new Scanner(System.in);
        int N = scanner.nextInt();
        int K = scanner.nextInt();

        int A = (N - 1) % (K + 1);
        while (true) {
            System.out.println(A);
            System.out.flush();

            A += K + 1;

            int V = scanner.nextInt();
            if (V >= N) {
                break;
            }
        }

    }

    public static void main(String[] args) {
        Yuki257 hoge = new Yuki257();
    }
}