2485. Find the Pivot Integer

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Given a positive integer n, find the pivot integer x such that: - The sum of all elements between 1 and x inclusively equals the sum of all elements between x and n inclusively. Return the pivot integer x. If no such integer exists, return -1. It is guaranteed that there will be at most one pivot index for the given input. Example 1: Input: n = 8 Output: 6 Explanation: 6 is the pivot integer

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solution.cppC++17

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