fun main(args: Array<String>) {
    b()
}

fun a() {
    when(readLine()) {
        "ABC" -> println("ARC")
        "ARC" -> println("ABC")
        else -> Unit
    }
}

fun b() {
    val (N, K) = readLine()!!.split(" ").map { it.toInt() }.let { it[0] to it[1] }
    val set = (1 .. N).toMutableSet()
    repeat(K) {
        val d = readLine()!!.toInt()
        val As = readLine()!!.split(" ").map { it.toInt() }
        set.removeAll(As)
    }
    println(set.count())
}