L = int(input())
N = int(input())
Wn = list(map(int,input().split()))
Wn_arr = sorted(Wn)

width = 0
count = 0
while count <= N-1:
    width += Wn_arr[count]
    count += 1
    if width > L:
        width -= Wn_arr[count - 1]
        count -= 1
        break

print(count)