题解 | #记负均正#

while True:
    try:
        length = int(input())
        nums = map(int, input().split())
        res = []
        count = 0
        for i in nums:
            if i < 0:
                count += 1
            elif i > 0:
                res.append(i)
        print(count, round(sum(res)/len(res), 1))
    except:
        break