题解 | 记负均正

def int_negative(n,m):
    negative = 0
    sum = 0
    positive = 0
    for i in m:
        if int(i) < 0:
            negative +=1
        elif int(i) > 0:
            sum += int(i)
            positive +=1

    if sum > 0:
        pos_avg = round(float(sum/positive),1)
    else:
        pos_avg = 0.0
    return negative,pos_avg
n = int(input())
m = input().split()
print(' '.join(map(str,(int_negative(n,m)))))