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

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

w.sort()

if n > 1:
    for i in range(1,n+1):
        if l >= w[i]:
            l -= w[i]
        else:
            ans = i
            break
else:
    if l >= w[0]:
        ans = 1
    else:
        ans = 0

print(ans)