题解 | #记负均正#

n = int(input())

nums = map(int, input().split())
positive_sum = 0.0
positive_num = 0
negative_num = 0
for num in nums:
    if num < 0:
        negative_num += 1
    elif num > 0:
        positive_sum += num 
        positive_num += 1

if positive_num != 0:
    positive_avg = round(positive_sum / positive_num, 1) #保留一位小数
else:
    positive_avg = 0.0
print(negative_num, end=' ')
print(positive_avg)