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Ripple Arrows (1011)
Instruction:
Place numbers of the specified list into cells, no more than one number per cell, so that each number appears exactly once in each row and column and all numbered cells are connected along the eight standard directions.
Black cells cannot contain numbers. An arrow in a black cell points to a number that is exactly its own value (in cells) away from that black cell in one of the eight standard directions. Absence of an arrow means there are no such numbers in that direction. An arrow may point to more than one such number.