//
// Created by Owner on 2015/08/01.
//

#include <bits/stdc++.h>

using namespace std;

int main(){
    int N, K;

    cin >> N >> K;
    K++;
    int A = (N-1)/K;
    int out_num = N - 1 - A * K, cpu_num = 0;

    while(true){
        cout << out_num<< endl;
        out_num += K;
        int tmp;
        cin >> tmp;
        if(tmp >= N){
            break;
        }
    }

    return 0;
}