class Calc0005
  def initialize(args)
    args = args.map { |l| l.chomp.split(/\s+/) }
    @l = args.shift.first.to_i
    @n = args.shift.first.to_i
    @ws = args.shift.map(&:to_i)
  end

  def run
    s = c = 0
    @ws.sort.each do |w|
      s += w
      break if s > @l
      c += 1
    end
    c
  end
end

puts Calc0005.new(STDIN.readlines).run if __FILE__ == $0