Help Chandan Count Triplets

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Problem description. Chandan is always excited to solve algorithmic problem. He finds a contest going on at codechef. One of the problems in the contest asks him to find the number of unique triplets of integers from a given array A such that their sum is less than or equal to a given integer M. Two triplets are considered same if all elements in them are same. Chandan asks you to help him solve

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solution.cppC++17

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