Harry and Primes

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Harry failed his OWLs. Unfortunately at Hogwarts, students cannot apply for re-evaluation. However, Professor McGonagall, being a benevolent teacher, decides to give Harry another chance. Professor McGonagall gives Harry a question. There are q queries and in each query two numbers x, y are given. For each query, the person should tell the count of integers between x and y (inclusive) which has p

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solution.cppC++17

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