var N : Int = 0
var K : Int = 0

fun DontSayN(now : Int) {
    if(now >= N) {
        return
    }

    if(now % (K + 1) == K || now == -1) {
        System.out.println(now + 1)
        var ans = readLine()!!.toInt()
        DontSayN(ans)
    }
    else{
        var next = ((now / (K + 1)) + 1) * (K + 1)
        System.out.println(next)
        var ans = readLine()!!.toInt()
        DontSayN(ans)
    }
}

fun main(args : Array<String>) {
    var arg = readLine()!!.split(" ").map { it.toInt() }
    N = arg[0]
    K = arg[1]
    DontSayN(-1)
}