L = int(input())
N = int(input())
lsW = list(map(int,input().split()))
lsW.sort()
cnt = 0
l = 0
for i in range(N):
    if l+lsW[i] <= L:
        cnt += 1
        l += lsW[i]
    else:
        print(cnt)
        exit()
print(cnt)