Write a function that returns the earned points in a single toss of a Darts game.
Darts is a game where players throw darts at a target.
In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:
The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1. Of course, they are all centered at the same point (that is, the circles are concentric defined by the coordinates (0, 0).
Write a function that given a point in the target (defined by its Cartesian coordinates
y are real), returns the correct amount earned by a dart landing at that point.
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