题解 | #记负均正II#

import sys
num =[]
ii=0
iii=0
for line in sys.stdin:
    a = line.split()
    for i in a:
        if int(i)<0:
            num.append(i)
        else:
            ii=ii+int(i)
            iii=iii+1
print(len(num))
if iii ==0:
    print('0.0')
else:
    print("{:.1f}".format(ii/iii))