Magical Bullets

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Chef is planning to eliminate the ghosts from his house with the help of some magical bullets he has. Each bullet has some power level $P_i$. A ghost can sometimes destroy the magical bullets if it possesses any of the skill S in the range 2 to K (both inclusive) such that S is a factor of $P_i$. Given the set of guns (the power of the guns), Chef is having and chef wants to pick only those guns

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solution.cppC++17

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