题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
n=int(input())
nums=list(map(int,input().split()))
#print(nums)
neg_n=0
pos=[]
for i in nums:
if i<0:
neg_n += 1
elif i>0:
pos.append(i)
if len(pos)==0:
print(neg_n,0.0)
else:
print(neg_n,round(sum(pos)/len(pos),1))
