题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
m=int(input())
n=map(int,input().split())
l=[]
ll=[]
ans1=0
for i in n:
l.append(int(i))
for i in range(len(l)):
if l[i]<0:
ans1+=1
elif l[i]>0:
ll.append(l[i])
a=sum(ll)
b=len(ll)
if a==0:
print(ans1,end=" ")
print(0.0)
else:
print(ans1,end=" ")
print(round(a/b,1))
