题解 | #记负均正#
记负均正
http://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
遍历。
input()
nums = map(int, input().split())
cnt1, cnt2, res = 0, 0, 0.0
for num in nums:
if num > 0:
cnt1 += 1
res = (res*(cnt1-1)+num)/cnt1
elif num < 0: cnt2 += 1
print(f"{cnt2} {round(res,1)}")
