#Write a program that reads a sequence of non-zero integers. First zero 
#value 
#will terminate the input. The program finds sum and average of the negative 
#numbers. Example: Input: 2 -5 6 7 -8 -9 0 Output: sum is -22 and average is 
#-7.333333 
def main():
	sum=0
	count=0
	num=int(input("enter non zero "))
	while(num!=0):
		if(num<0):
			count+=1
			sum+=num
		num=int(input("enter non zero "))
	if(count>0):
		print(sum, sum/count)
	else:
		print("no negative numbers")
main()