Badminton Tournament

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The Sports Society of IITJ is organising an intra-level Badminton championship. There are N students in IITJ. The students are numbered from 1 to N and each student's skill can be characterised by a positive integer Ai. You want to know if all students numbered from l to r are participating, what are the number of pairs of students who have same skill level. More formally, you want to know the nu

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solution.cppC++17

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