题解 | #记负均正II#

arr1 = [] # 存放正数
arr2 = [] # 存放负数
while True:
    try:
        n = int(input())
        if n > 0:
            arr1.append(n)
        else:
            arr2.append(n)
    except: # 在python中对文件结束符的判断
        print(len(arr2))
        if len(arr1) == 0:
            print('%.1f'%len(arr1))
        else:
            print(format(sum(arr1)/len(arr1),'.1f')) # format用法
        break