题解 | #记负均正#

while True:
    try:
        N = int(input())
        n_list = input().split()
        minus = 0
        sum_up = []
        for i in n_list:
            if int(i) < 0:
                minus += 1
                N -= 1
            if int(i) == 0:
                N -= 1
            elif int(i) > 0:
                sum_up.append(i)
        avg = sum(list(map(int,sum_up)))/N
        print("%i %.1f" % (minus, avg))
    except:
        break