题解 | #记负均正#

while True:
    try:
        n = int(input())
        nums = list(map(int, input().strip().split()))

        pos = [num for num in nums if num > 0]
        neg = [num for num in nums if num < 0]
        if sum(pos) != 0:
            print(len(neg), f"{sum(pos)/len(pos):.1f}")
        else:
            print(len(neg), "0.0")
    except:
        break