用whilt True 来读取while(cin>>)读入，直接在while True里判断

negative = 0
positive = 0
sum_p = 0
while True:
    try:
        nums = input()
        if int(nums) < 0:
            negative += 1
        else:
            positive += 1
            sum_p += int(nums)
    except:
        break
avrage = 0.0
if positive != 0:
    avrage = sum_p / positive
print(negative)
print('%.1f' % avrage)