L = int(input())
N = int(input())

Ws = list(map(int,input().split()))

counter = 0
Width = 0
Ws.sort()
flag = 1


for i in range(0,N):
    if Width + Ws[i] <= L:
        Width += Ws[i]
        counter += 1
    else:
        print(counter)
        flag = 0
        break
if flag:
    print(counter)