def main
  l = gets.to_i
  n = gets.to_i
  ws = gets.split.map(&:to_i)
  cnt = 0
  total = 0
  ws.sort!

  while !ws.empty?
    cur = ws.shift
    break if l < total + cur

    cnt += 1
    total += cur
  end

  cnt
end

puts main