题解 | #记负均正II#

lista = []
fu_list = []
slist = []
while True:
    try:

        lista.append(int(input()))

    except:
        break

for i in lista:
    # print(i)
    if i < 0:
        fu_list.append(i)
    else:
        slist.append(i)
# print(fu_list,slist)
print(len(fu_list))
if len(slist) == 0:
    print("0.0")
else:
    print('{0:.1f}'.format(float(sum(slist) / len(slist))))