L = int(input())
N = int(input())
wide = list(map(int, input().split()))
wide.sort()

i = 0
sum = 0
for t in range(N):
    if sum +wide[i] <=L:
        sum += wide[i]
        i += 1
    else:
        print(i)
        break
if  i == N:
    print(i)