华为机试HJ105记负均正II

题目：

想法：

分别记录输入中的正数和负数，根据规则计算平均值即可

count = 0
sum = 0
sum_count = 0
while True:
    try:
        number = float(input())
        if number < 0:
            count += 1
        elif number >= 0:
            sum += number
            sum_count += 1
    except:
        break
if sum == 0:
    print(count)
    print(0.0)
else:
    print(count)
    print("%.1f"%(sum/sum_count))