VK and NCR

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VK was sitting bored in class (while Harshit was busy finding his 5T), and observes a particular expression written on his blackboard. As he loves math (and was given the task of problem setting), he made a new question for you! He gives you the following equation: , where x can be any integer. Given the value of N, he asks you to maximize the value of k. Output the answer modulo 109+7 Input

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solution.cppC++17

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