WIZARD AND ARRAYS

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Wizard has an array of integers named a. He has to find out the bitwise-AND of all the pairs of elements of the array. Before carrying out the operation, he wants to make sure that he has just enough bits to store the answer of the AND operations. Can you help Wizard in finding the $minimum$ number of bits that he needs to have to store the answer of the $bitwise-AND$ of any two numbers of the a

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solution.cppC++17

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