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

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

w.sort()
g = [0] * n

for i in range(n):
    g[i] = sum(w[:(i+1)])

answer = 0

for i in range(n):
    if g[i] > l:
        answer = i
        break
else:
    answer = n

print(answer)