2670. Find the Distinct Difference Array

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You are given a 0-indexed array nums of length n. The distinct difference array of nums is an array diff of length n such that diff[i] is equal to the number of distinct elements in the suffix nums[i + 1, ..., n - 1] subtracted from the number of distinct elements in the prefix nums[0, ..., i]. Return the distinct difference array of nums. Note that nums[i, ..., j] denotes the subarray of nums

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solution.cppC++17

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