Unique Mode

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You are given an array $A$ of length $N$ such that the **maximum frequency** of any element in the array is **at most** $100$. Count the number of subarrays with unique [mode](https://en.wikipedia.org/wiki/Mode_(statistics)). **Note:** - Mode of an array is the element with maximum frequency. - A subarray is said to have a unique mode if there exists only one element with maximum frequency. - *

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solution.cppC++17

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