B - Get The Gold

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A man in his death-bed told his lazy son that throughout his life he had worked very hard. With the money he saved he has bought gold. This gold is hidden in a forest which is represented by a 2-dimensional plane in 3-dimensional space. There are two special trees **A** and **B** in the forest. The son needs to find these trees, and a special stone **S**. He must walk from **S** to **A** along the

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solution.cppC++17

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