| ||In a restaurant, if you were pleased by the waiter's service, you may leave him a tip -- you pay him more than the actual value of the bill, and the waiter keeps the excess money. In some countries, not leaving a tip for the waiter is even considered impolite.
During my recent holiday I was having dinner in a foreign restaurant. The pamphlet from my travel agency informed me that the proper way of tipping the waiter is the following:
Clearly, sometimes there may be multiple "correct" ways of settling the bill. I'd like to know exactly how many choices I have in a given situation. I could program it easily, but I was having a holiday... and so it's you who has to solve this task.
You will be given:
- The sum I pay must be round, i.e., divisible by 5.
- The tip must be between 5% and 10% of the final sum I pay, inclusive.
Write a function that computes how many different final sums satisfy the conditions above.
- an int bill -- the amount I have to pay for the dinner
- an int cash -- the amount of money I have in my pocket
|Method signature:||int possiblePayments(int bill, int cash)|
|(be sure your method is public)|
|-||Assume that both bill and cash are in dollars.|
|-||All the money I have is in one-dollar banknotes.|
|-||bill and cash are between 1 and 2,000,000,000, inclusive.|
|-||bill doesn't exceed cash.|
|4 isn't a round sum, and 5 is too much.|
|The only correct choice is to pay 25 dollars, thus leaving a tip of 2 dollars.|
|The same bill, but I don't have enough money to leave an appropriate tip.|
|This time, it is appropriate to pay either 235 or 240 dollars. Sadly, I don't have enough money for the second possibility.|
|A large bill, but with that much money I don't care.|