import math

def calcPrice (zone,x):
    if zone == 1:
        price = x * 1
    elif zone == 2:
        price = x * 0.8
    elif zone == 3:
        price = x * 0.5
    else:
        print zone,' is not a valid zone. Please try again'
        return 0

    return price


def insertCoin (price):
    coin = int(raw_input('Please insert coin : '))
    if coin == 0.10 or coin == 0.20 or coin == 0.50 or coin == 1 or coin == 2 :
        if price > coin:
            price = price - coin
            print 'You have to insert more coins. New price is : ', price
            return insertCoin (price)
        else:
            print 'Thank You'
            return 0
    else:
        print coin ,'is not accepted'
        print 'Accepted coins : 0.10 , 0.20 , 0.50 , 1 , 2'
        return insertCoin(price)




    
print 'Please give ticket type :'
print '1 for 1rst zone'
print '2 for 2nd zone'
print '3 for 3rd zone'
zone = int(raw_input('Your choice : '))
x = int(raw_input('Please give amount of tickets : '))
price = calcPrice (zone,x)
print 'The total cost is : ',price
insertCoin (price)