func main()
	var n: int :: cui@inputInt()
	var k: int :: cui@inputInt()
	if(k >= n - 1)
		do cui@print("\{n - 1}\n")
		do cui@flush()
		ret
	end if
	var last: int :: (n - 1) % (k + 1)
	do cui@print("\{last}\n")
	do cui@flush()
	while(true)
		var num: int :: cui@inputInt()
		if(num >= n)
			ret
		end if
		do last :+ k + 1
		do cui@print("\{last}\n")
		do cui@flush()
	end while
end func