题解 | #记负均正#

while True:
    try:
        n=int(input())
        lst=list(map(int,input().split()))
        fs=0
        zs=0
        zero=0
        sum=0
        for a in lst:
            if a==0:
                zero+=1
            elif a<0:
                fs+=1
            elif a>0:
                zs+=1
                sum+=a
        if zs==0:
            print(fs,0.0)
        else:
            print(fs,format(sum/zs,'.1f'))

    except:
        break