#include "bits/stdc++.h"

using namespace std;
using ll = long long;
const double pi = acos(-1);
#define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++)
#define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) RFOR(i,0,n)
#define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME
#define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__)
#define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__)
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v) {
	REP(i, v.size()) { if (i)os << " "; os << v[i]; }return os;
}
template<typename T> ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
	REP(i, v.size()) { if (i)os << endl; os << v[i]; }return os;
}

const ll INF = 1LL << 60;
ll MOD = 1000000007;
ll _MOD = 1000000009;
double EPS = 1e-10;

#define int long long

inline void my_io() {

	std::ios::sync_with_stdio(false);

	std::cin.tie(0);

	cout << fixed << setprecision(16);

	//cout << setprecision(10) << scientific << ans << endl;
}

signed main() {
	ll n, k, a, b;

	cin >> n >> k;

	vector<bool> v(n, false);

	for (int i = v.size() - 1; i > 0;  i -= (k + 1)) {
		v[i] = true;
	}
	
	ll now = 1;

	bool flag = false;

	FOR(i, now, now + k) {
		flag = flag || v[i];
	}

	if (!flag) {
		cout << 0 << endl;
		cin >> b;
		now = b;
	}

	while (true) {
		FOR(i, now, now + k + 1) {
			if (v[i]) {
				cout << i << endl;
				break;
			}
		}

		cin >> b;
		
		if (b >= n) {
			break;
		}

		now = b;
	}
}