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Nuribou (904)
Instruction:
Shade some empty (non-numbered) cells black (leaving the other cells white) so that the grid is divided into non-overlapping regions; cells of the same color are considered in the same region if they are adjacent along edges. Each given number must be in a white region that has the same area in cells as that number. Each white region must have exactly one given number. All black regions must be a rectangle or square of width or height 1. Black regions of the same size cannot touch each other at a corner.