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Skyscrapers + Fillomino (1145)
Instruction:
Divide the grid along the dashed lines into regions (called polyominoes) so that no two polyominoes with the same area share an edge. Inside some cells are numbers; each number must equal the area of the polyomino it belongs to. A polyomino may contain zero, one, or more of the given numbers. (It is possible to have a "hidden" polyomino: a polyomino without any of the given numbers. "Hidden" polyominoes may have any area, including a value not present in the starting grid, such as a 6 in a puzzle with only clues numbered 1-5.)
Each cell also contains a skyscraper of the same height as the area of that cell's polyomino. The numbers outside the grid indicate how many skyscrapers can be seen in the respective row or column from the respective direction; shorter and equal-size skyscrapers are hidden behind taller (and equal-size) ones.