题解 | #记负均正#

依题意得

while True:
    try:
        n=int(input())
        nums=map(int,input().split())
        positive=[]
        negative=0
        for j in nums:
            if j > 0 :
                positive.append(j)
            elif j < 0 :
                negative+=1
            else:
                pass
        res=float(0.0)
        for i in range(len(positive)):
            res += positive[i]
        print (negative,round(res/len(positive),1))
    except:
        break