TNP CHALLENGE 402

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XYZ school has the following grading policy: If mark is less than or equal to 50, the student gets 'F', If mark is greater than 50, but less than or equal to 55, student gets a 'D', If mark is greater than 55, but less than or equal to 60, student gets a 'C', If mark is greater than 60, but less than or equal to 75, student gets a 'B', if mark is greater than 75, but less than or equal to 9

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solution.cppC++17

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