#![allow(non_snake_case)]

use std::io::{ self, prelude::* };

fn readline() -> String {
    let mut s = String::new();
    io::stdin().read_line(&mut s).expect("i/o error");
    s.trim().to_owned()
}

fn recv() -> i64 {
    readline().parse().unwrap()
}

fn send(x: i64) {
    println!("{}", x);
    io::stdout().flush().expect("i/o error");
}

fn main() {
    let line = readline();
    let mut tokens = line.split_whitespace();
    let N: i64 = tokens.next().unwrap().parse().unwrap();
    let K: i64 = tokens.next().unwrap().parse().unwrap();

    let mut x = (N-1) % (K+1);
    loop {
        send(x);

        let y = recv();
        if y >= N { break; }
        assert!(x+1 <= y && y <= x+K);

        x += K+1;
    }
}