题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
n = input()
s = list(map(int,input().split()))
fu = []
zh = []
for i in s:
if i >0:
zh.append(i)
elif i<0:
fu.append(i)
if zh == []:
print(f'{len(fu)} 0.0')
else:
#print(f'{len(fu)} {"%.1f" %float(sum(zh)/len(zh))}')
print(f'{len(fu)} {round(sum(zh)/len(zh),1)}')
