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))