One common friend

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In a primal culture, there are infinite gods, the supreme god is called $ένας$. A god can have a set of friends but every other god is a friend of $ένας$. You as a mythologist need to find all gods who has only $ένας$ as a mutual friend of $N$-th god. ###Input: - The input will contain $N$, denoting $N$th god. ###Output: - List of all gods satisfying the criterion. Note: Refer to

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solution.cppC++17

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