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

l = int(input())
n = int(input())
w = list(map(int,input().split()))

w.sort()

box = 0
ans = 0

for i in range(n):
    if box > l:
        ans = i - 1
        break
    else:
        box += w[i]
else:
    ans = i

print(ans)