# coding: utf-8
def II(): return int(input())
def ILI(): return list(map(int, input().split()))
L = II()
N = II()
W = ILI()
W.sort()
block_sum = 0
ans = 0
for block in W:
    if block_sum + block <= L:
        block_sum += block
        ans += 1
    else:
        break

print(ans)