Count subarrays with ≥k identical pairs

Question

LeetCode 2537. Count the Number of Good Subarrays – Given an integer array nums and an integer k, return the number of contiguous subarrays in which there are at least k pairs of equal elements (each value contributes at most one pair, regardless of multiplicity).

leetcode.com/problems/count-the-number-of-good-subarrays/description/