#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001



int main(){
	int N,K;
	cin>>N>>K;
	int last = -1;
	while(true){
		int nxt = last/(K+1);
		nxt *= K+1;
		nxt += (N-1) % (K+1);
		if(nxt<=last)nxt += K+1;
		cout<<nxt<<endl;
		last = nxt;
		int ret;
		cin>>ret;
		if(ret>=N){
			return 0;
		}
		last = ret;
	}
	
	return 0;
}