BOOKWRITER

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Sam wants to write a book but he is not a good writer. So, he finds $K$ writers who can read his mind and write his ideas into a book. Sam wants to buy pens for these $K$ writers. Sam knows that the writers will start fighting if any one among them has more number of pens than any of the other writers. So, he goes to a street which has $N$ shops to buy pens. The $i$-th shop has $a_i$ number of pe

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solution.cppC++17

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