Cure It!

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*Yes, the contest theme is COVID-19. No, we're not uncreative. We're just lazy.* Shriram has begun his journey to find a cure for COVID-19. He has $n$ different medicines with him numbered $a_1$, $a_2$, .. , $a_n$. He encounters infinitely many viruses numbered $1$, $2$,… covering all the positive integers. He can kill a virus numbered $x$ $(x > 0)$, if he has at least one medicine $a_j$ $(1 \l

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solution.cppC++17

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