Extend the number of samples about arc_kaggle HOT 5 CLOSED

Some observations about the "Separate by shapes" tasks:

• The matrices tend to be big in all cases except two (777 most importantly), all the matrices are at least 9x9.
• It is worth to do some preprocessing to determine wheter we want to consider multicolor Shapes or just normal Shapes (obviously, only non-background ones). Check whether there is the same amount of (multicolor) Shapes in the input and the output. Also with diagonals.
• How shall we decide how to modify the output? Shapes that are in the same position or are of the same color seem reasonable approaches, but not sure if this will be enough. How to choose the output in tasks like 429, 602 or 750, for example?
• If the number of Shapes is the same in the input and in the output, then consider positions to select the output Shapes. This will not catch tasks like 396 or 517, but I think it's the best I can do.
• The number of Shapes in a matrix is always low. Haven't seen any case with more than 7.

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I uploaded a first version in this commit: 583dbce.
For now, it deals with most of the "separate by shapes" cases. It solves tasks like 496, 528, 611 or 681, amongst several others.

I still need to improve the way of choosing the final best three candidates and deal with the "separate by colors" tasks.

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Next improvement should be: if there is some fixedColor, then only consider it if it is the only color (apart from the background color)

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For separating by color, I should:

• Consider colors that are not fixed and, are not background and do not vanish. In general, not consider common colors
• Consider tasks in which each sample has at least one of such colors, and at least one sample contains two of such colors

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Separation by colors done in 2934eaa. Closing the issue.

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