#Write a function div_3 that has one parameter, integer number. The 
#function returns True if the parameter is divisible by 3 and False 
#otherwise. 
#Write a program that ask user to enter how many numbers to 
#generate in range -20 to 20. 
#Print each integer. For each integer, the program uses function div_3 to 
#check divisibility by 3. Find the total number of integers 
#divisible by 3 out of ALL randomly generated numbers. Use function random 
#library. Add import random to your program. Use function 
#randint(min_range, max_range) with the following syntax: 
#random.randint(-20, 20) 

#Example: Assume that user enters 5 and program generates 5 integers
# 4 -5 20 -20 6
#Output:
# 4 is NOT divisible
#-5 is NOT divisible
#20 is NOT divisible
#-20 is NOT divisible
#6 is divisible

#total = 1

import random

def div_3(num):
	if(num%3==0):
		return True
	else:
		return False

def main():

	size=int(input("how many ints to generate? "))
	counter=1
	total=0
	
	while(counter<=size):
		num=random.randint(-20,20)
		print(num)
		result=div_3(num)
		if(result==True):
			print(num, "divisible by 3")
			total=total+1
		else:
			print(num, "is NOT divisible by 3")

		#alternatively
		#if(div_3(num):
		#	print(num, "divisible by 3")
	        #       total=total+1
		#else:
		#       print(num, "is NOT divisible by 3")

		counter=counter+1
		
	if(total>0):
		print("there are", total, "numbers divisible by 3") 
	else:
		print("No numbers divisible 3")
main()