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Лимит времени 1000/1000/1000/1000 мс. Лимит памяти 65000/65000/65000/65000 Кб.
Problem description There are 4 rectangles on a plane surface. Calculate total area that they cover. Input There are 16 integer values in 4 lines which absolute value is not bigger than 1000. On each line there are 4 numbers – coordinates of rectangle (left bottom corner and right top corner). Output Print total area that they cover. Example
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