def test():
    L = int(input())
    N = int(input())
    w = list(map(int,input().split()))

    count = 0
    sorted(w)

    while w:
        L -= min(w)
        w.remove(min(w))
        if L < 0:
            break
        count += 1

    print(count)

if __name__ == "__main__":
    test()