#Program 3 (100 points) In USA, each state has different rules for 
#license plates. In this program we will assume that all cars in 
#NJ have 6 digit number license plates, all cars in NY have 7 digit 
#number license plates , and all cars in RI have 4 or 5 digit 
#number license plates. Your program will read a number of cars in 
#the parking lot, license plate for each car, and finds the number 
#of cars from each of the 3 states listed above (NJ, NY, RI). 
#Write the following functions: 
#count_digit(num) - finds and returns the number of digits of 
#the parameter num. Assume that num is positive. 
#state(license_plate) - has one parameter - license plate. The 
#function returns 1, if the car from NJ, 2 - from NY, 3 - from RI. 
#This function will use function count_digit 
#parking(num_cars) - has one parameter, number of cars in the 
#parking lot. The function reads the license plate for each car in 
#the parking lot. The function finds and returns three values: the 
#number of cars from NJ, NY and RI. This function will use 
#function state to determine the state for each car 
#write main that reads the number of cars and finds the number 
#of cars from each of the 3 states listed above (NJ, NY, RI). 

#Pay attention: your input for license plate number could be ANY 
#POSITIVE INTEGER. And your program will ignore any numbers that 
#are shorter than 4 digits and longer than 7 digits since they 
#don't belong to any state. 

def count(num):
	counter=0
	while(num>0):
		num=num//10
		counter+=1

	return counter

#example: num=123 counter=0 123>0 True num=123//10=12 counter=1
#12>0 num=12//10=1 counter=2
#1>0 num=1//10=0 counter =3
#0>0 False loop is terminated

def state(license_plate):
	length=count(license_plate)
	if(length==6):
		result=1	
	elif(length==7):
		result=2
	elif(length==4 or length==5):
		result=3
	return result

def parking(num_cars):
	nj=0
	ny=0
	ri=0
	for i in range(num_cars):
		plate=int(input("enter license plate "))
		length=count(plate)
		if(length>=4 and length<=7):
			state_result=state(plate)
			if(state_result==1):
				nj+=1
			elif(state_result==2):
				ny+=1
			elif(state_result==3):
				ri+=1
	return nj, ny, ri

def main():
	num_cars=int(input("parking lot size "))
	nj, ny, ri= parking(num_cars)
	print("NJ", nj, "NY", ny, "RI", ri)
main()