# -*- coding: utf-8 -*-

l, = map(int, raw_input().split())
n, = map(int, raw_input().split())
w = map(int, raw_input().split())

w = sorted(w)

s = 0
cnt = 0
for v in w:
    if v + s <= l:
        cnt += 1
        s += v
    else:
        break

print cnt