from strutils import split, parseInt
from sequtils import map
from algorithm import sort

var l = readLine(stdin).parseInt()
var n = readline(stdin).parseInt()
var ws = readLine(stdin).split(' ').map(parseInt)

ws.sort(system.cmp[int])

var i = 0
var width = 0
while i < n:
  width += ws[i]
  if width > l:
    break
  i += 1

echo i