题解 | #记负均正II#

s = []  # 记录非负数
c = 0  # 记录负数个数
while 1:
    try:
        num=int(input())
        if num>=0:
            s.append(num)
        else:
            c+=1
    #判断输入结束
    except EOFError:
        if len(s)==0:
            print(c)
            print(0.0)
        else:
            print(c)
            avg = sum(s) / len(s)
            print(f'%.1f' %avg)
        break