题解 | #记负均正#代码稍微有点长，但不难理解

while True: try: n = int(input()) num_list =list(map(int,input().split(" "))) count = 0 for i in num_list: if i < 0: count += 1 for j in range(len(num_list)-1,-1,-1): #倒着删除 item = num_list[j] if item <= 0: num_list.remove(item) #print(num_list) avg = sum(num_list) / len(num_list) avg = round(avg,1) print(count,avg) except: break