2537. Count the Number of Good Subarrays

Given an integer array nums and an integer k, return the number of good subarrays of nums. A subarray arr is good if there are at least k pairs of indices (i, j) such that i < j and arr[i] == arr[j]. A subarray is a contiguous non-empty sequence of elements within an array. Example 1: Input: nums = [1,1,1,1,1], k = 10 Output: 1 Explanation: The only good subarray is the array nums itself. E