def main():
    L = int(input())
    N = int(input())
    W = list(map(int, input().split()))
    W.sort()

    count = 0
    for w in W:
        if w <= L:
            count += 1
            L -= w
        else:
            break

    print(count)

if __name__ == "__main__":  # {{{
    try:
        import test
        test.test()
    except:
        main()  # }}}