题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8?tpId=37&tqId=21320&rp=1&ru=/exam/oj/ta&qru=/exam/oj/ta&sourceUrl=%2Fexam%2Foj%2Fta%3FtpId%3D37&difficulty=undefined&judgeStatus=undefined&tags=&title=97
n = int(input())
nums = list(map(int, input().split(" ")))
neg = 0
act = 0
s = 0
for num in nums:
if num < 0:
neg += 1
elif num > 0:
act += 1
s += num
print("{} {:.1f}".format(neg, s/act if act > 0 else 0))
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