The Rectangular Frame

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In a museum there is an empty wall. We can imagine this wall as a triangle on a coordinate plane with vertices (0; 0), (N; 0), (N; N * A / B), where N, A, B are some positive integers. The space has been allotted to a photographer who wants his masterpiece on that wall. He is confused with the size of the photo frame and wants you to decide the number of ways in which he can fix a rectangular fra

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solution.cppC++17

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