81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
def exchange_money(budget, exchange_rate):
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"""
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:param budget: float - amount of money you are planning to exchange.
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:param exchange_rate: float - unit value of the foreign currency.
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:return: float - exchanged value of the foreign currency you can receive.
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"""
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return budget / exchange_rate
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def get_change(budget, exchanging_value):
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"""
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:param budget: float - amount of money you own.
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:param exchanging_value: int - amount of your money you want to exchange now.
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:return: float - amount left of your starting currency after exchanging.
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"""
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return budget - exchanging_value
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def get_value_of_bills(denomination, number_of_bills):
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"""
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:param denomination: int - the value of a bill.
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:param number_of_bills: int - amount of bills you received.
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:return: int - total value of bills you now have.
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"""
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return denomination * number_of_bills
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def get_number_of_bills(budget, denomination):
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"""
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:param budget: float - the amount of money you are planning to exchange.
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:param denomination: int - the value of a single bill.
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:return: int - number of bills after exchanging all your money.
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"""
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return int(budget) // int(denomination)
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def exchangeable_value(budget, exchange_rate, spread, denomination):
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"""
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:param budget: float - the amount of your money you are planning to exchange.
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:param exchange_rate: float - the unit value of the foreign currency.
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:param spread: int - percentage that is taken as an exchange fee.
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:param denomination: int - the value of a single bill.
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:return: int - maximum value you can get.
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"""
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percentage = spread / 100
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real_exchange_rate = exchange_rate + exchange_rate * percentage
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number_of_bills = get_number_of_bills(
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budget / real_exchange_rate, denomination)
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return number_of_bills * denomination
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def non_exchangeable_value(budget, exchange_rate, spread, denomination):
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"""
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:param budget: float - the amount of your money you are planning to exchange.
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:param exchange_rate: float - the unit value of the foreign currency.
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:param spread: int - percentage that is taken as an exchange fee.
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:param denomination: int - the value of a single bill.
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:return: int non-exchangeable value.
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"""
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percentage = spread / 100
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real_exchange_rate = exchange_rate + exchange_rate * percentage
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number_of_bills = get_number_of_bills(
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budget / real_exchange_rate, denomination)
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foreign = number_of_bills * denomination
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return int(budget / real_exchange_rate - foreign)
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