L = int(input())
N = int(input())
blocks = [int(i) for i in input().split()]
blocks.sort()
res = 0
t = 0
for i in range(N):
    if t + blocks[i] <= L:
        t += blocks[i]
        res += 1
    else:
        print(res)
        break
if i == 0 or res == N:
    print(res)