#Write a function def sum_ave_odd_index(my_list) that finds and returns the sum and average 
#of ALL elements on ODD positions in the list. Write main to test your program 

import random
def sum_ave_odd_index(my_list):
	total=0
	c_odd_index=0
	for i in range(len(my_list)):
		if(i%2!=0):
			total=total+my_list[i]
			c_odd_index=c_odd_index+1
	return total, total/c_odd_index

def main():
	size=int(input("size of the list "))
	my_list=[]
	for i in range(size):
		my_list.append(random.randint(-10, 10))
	print(my_list)
	if(size<=1):
		print("invalid input")
	else:
		total, ave=sum_ave_odd_index(my_list)
		print("total", total, "average", ave)
main()