题解 | #记负均正II#

n_neg = 0
n_non = 0
sum = 0
while True:
    try:
        num = int(input())
        if num >= 0:
            n_non += 1
            sum += num
        else:
            n_neg += 1
    except:
        break
print(n_neg)
if n_non:
    print(format(sum/n_non, '.1f'))
else:
    print('0.0')