Sea Trip

road_disctance = 210 #km
time_to_travel = 3 #days
car_fuel_conspumtion = 7 #liters per 100 km
gas_price = 1.85 #per liter

money_for_food = float(input())
money_gifts = float(input())
money_for_hotel = float(input())

gas_needed = (road_disctance * 2) / 100 * car_fuel_conspumtion
money_for_gas = gas_needed * gas_price
total_money_to_spend = (3 * money_for_food) + (3 * money_gifts)

day_one_discount = money_for_hotel * 0.9
day_two_discount = money_for_hotel * 0.85
day_three_discount = money_for_hotel * 0.8

total_expenses = money_for_gas + total_money_to_spend + day_one_discount + day_two_discount + day_three_discount
print(f'Money needed: {total_expenses:.2f}')