Nuribou is a logic puzzle invented by Nikoli. A rectangular or square grid contains numbers in some cells. The task is to blacken some empty cells according to the rules: - The black cells divide the grid in areas of white cells. Each area contains one cell with a number. - Each area must have the same number of white cells as the number it contains (including the numbered cell). - Black cells form horizontal or vertical stripes, that must not be orthogonally adjacent. Each stripe must be exactly one cell wide. - If two stripes are connected diagonally, the length of the stripes must be different.
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