题解 | #记负均正#

while True:
    try:
        a = int(input())
        b = list(map(int,input().split()))
        b.sort()
        while 0 in b:
            b.remove(0)
        k = len(b)
        for i in range(len(b)):
            if b[i] > 0:
                k = i
                break
        print(k,format(sum(b[k:])/(len(b)-k),'.1f'))
    except:
        break