题解 | #记负均正#

while True:
    try:
        n = int(input())
        m1 = list(map(int, input().split()))
        m2 = [i for i in m1 if i < 0]
        m3 = [i for i in m1 if i > 0]
        if m3 == []:
            print(len(m2) , 0.0)
        else:
            print(len(m2) , round((sum(m3) / len(m3)),1))

    except:
        break