题解 | #记负均正#
记负均正
https://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
n = int(input()) num_list = list(map(int,input().split())) a = [] b = [] # 遍历整个列表 for i in num_list: if i > 0: a.append(i) elif i < 0: b.append(i) if len(a) != 0: print(len(b),round(sum(a) / len(a),1)) else: print(len(b),0.0)