3D Cubes

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Chandan gave his son a cube with side $N$. The $N*N*N$ cube is made up of smaller $1*1*1$ cubes. Chandan's son is extremely notorious just like him. So he dropped the cube inside a tank filled with paint. The cube got totally immersed in that tank. His son was somehow able to take the cube out of the tank. But soon he realized that the cube had gone all dirty because of the paint. Since Chandan

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solution.cppC++17

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