fun main() {
    var l = readInputLine().toInt()
    readInputLine()
    val wArr = readInputLine().split(" ").map { it.toInt() }.sorted().toIntArray()

    for ((i, w) in wArr.withIndex()) {
        if (w > l) {
            println(i)
            return
        }
        l -= w
    }

    println(wArr.size)
}

fun readInputLine(): String {
    return readLine()!!
}