import kotlin.math.*

fun main()
{
    val L = readLine()!!.toInt()
    val N = readLine()!!.toInt()
    val W = readLine()!!.split(" ").map(String::toInt).sorted()
    var sum = 0
    var n = 0
    for (w in W) {
        if (sum + w > L)
            break
        sum += w
        n++
    }
    println(n)
}