题解 | #记负均正#

n = int(input())
lst = list(map(int, input().split()))
n1 = 0  # 负数个数
n2 = 0  # 正数个数
sum = 0  # 正数和

for i in lst:
    if i < 0:
        n1 += 1
    if n == 0:
        continue
    if i > 0:
        n2 += 1
        sum += i

    if n2 == 0:  # 防止全0
        d = 0
        avg = round(0.01,1)
    else:
        avg = sum / n2
        avg = round(avg, 1)
print(n1, avg)