题解 | #查找输入整数二进制中1的个数#

sum1 = 0
sum2 = 0
k = 0.0
while(True):
    try:
        i = int(input())
        if i<0:
            sum1=sum1+1
        else:
            sum2=sum2+i
            k=k+1
        try:
            a = sum2/k
        except:
            a = 0.0
    except:
        break

print("%d" % (sum1))
print("%.1f" % (a))