Python题解 | #记负均正#

import sys



while True:
    try:
        a = int(input())
        nums = list(map(int, input().split(' ')))
        res = []
        ans = 0
        s = 0.0
        x = 0.0
        flag = 0
        for i in nums:
            if i != 0:
                res.append(i)
            if i < 0:
                ans += 1
            if i != 0 and i > 0:
                flag += 1
                s += i
        if flag == 0:
            x = 0.0
        else:
            x = s / flag
        print(ans, end=' ')
        print('%.1f' % x)
    except:
        break