The Teacher

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Dan is a teacher at a school. His students adore him but they also make a lot of noise. Dan is fed up and devises a way to make the students quiet down. He goes out to the garden and collects N sticks. He gives each stick a serial number from 1 to N for convenience. Interestingly the length of each stick is equal to its serial number. Now he asks his students to find out the number of distinct tri

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solution.cppC++17

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