def main():
    """ main """
    L = int(input())
    N = int(input())
    WS = sorted(list(map(int, input().split())))
    dp = [0 for _ in range(N+1)]

    cnt = 0
    total = 0
    for i in WS:
        if total+i <= L:
            total += i
            cnt += 1
        else:
            break
    print(cnt)


main()