题解 | #记负均正#
记负均正
http://www.nowcoder.com/practice/6abde6ffcc354ea1a8333836bd6876b8
try:
n = int(input())
z_s = []
f_s = []
for i in input().split():
int(i) < 0 and f_s.append(int(i))
int(i) > 0 and z_s.append(int(i))
print(f"%s %0.1f" % (len(f_s), 0 if not len(z_s) else sum(z_s)/len(z_s)) )
except:
break
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