Chuchu and Xyz are playing a game.
They are keeping score by adding records to a String
, like this:
Xyz, 10
Chuchu,5
Xyz, 20
Xyz, 4
Chuchu, 30
Xyz, 31
Chuchu, 31
Chuchu, 10
The winner of the game is the player with the most total points. For the game above, the winner is Chuchu, since he scored 76 points to Xyz's 65. Note that zero is a valid number of points to have scored and should not be treated separately.
Write a function called winner
that determines the winner of the game.
It accepts a single String
argument containing CSV records as shown above and should return
a String
containing either the winner: either Xyz
or Chuchu
.
If both player score the same number of points, you should return "Tie".
A few notes.
First, you'll want to use both split
and trim
, two of our familiar functions for working with String
data.
Second, while each line will contain a record, there may be extra whitespace surrounding each record.
(The data was entered by bored animals.)
Third, recall that you can use String.toInt
to convert a String
to an Int
.
Fourth, the only two players you need to handle are Xyz and Chuchu.
Finally, if the String
passed is null
or contains no lines, you should return null
.
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