#problem 15
def game():
	sum=0
	product=1
	count=0
	print("enter positive integers, first zero or negative terminates input")
	num=int(input(""))
	while(num>0):
		last_digit=num%10
		#for example, num=234, 234%10=4
		if(last_digit%3==0):
			sum=sum+num
			product=product*num
			count+=1
		num=int(input(""))
	if(count>0):
		return sum, product, count
	else:
		return -1, -1
def main():
	sum, product, count=game()
	if(sum==-1 and product==-1):
		print("no numbers with last digit divisible by 3")
	else:
		print("count =",count, "sum =",sum, "product =", product)
main()