#Write a program that reads 5 grades and creates a list. The program 
#finds sum and average of the grades 
#Write the following functions: make_list and sum_ave

def make_list(size):
	#different way to create a list, not using append

	my_list=[0]*size
	print("Enter", size, "grades")
	for i in range(size):
		grade=int(input())
		my_list[i]=grade

	return my_list
#size=5, [0, 0, 0, 0, 0], then you input first integer
#my_list[0]=15, my_list[1]=100, my_list[2]=56

def sum_ave(my_list):
	
	length=len(my_list)
	sum=0
	for i in range(length):
		sum=sum+my_list[i]
	
	return sum, sum/length
	
def main():
	size=int(input("enter the size of the class "))
	if(size>0):
		grades=make_list(size)
		print("the grades are")
		print(grades)
		sum, ave=sum_ave(grades)
		print("sum=", sum, "ave=", ave)
	else:
		print("empty class")
main()