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Subarrays with K Different Integers

Explore how to identify and count subarrays with exactly k distinct integers using the sliding window pattern. This lesson helps you understand problem constraints, develop a clear solving approach, and implement an efficient solution in C# for coding interviews.

Statement

You are given an integer array nums and an integer k. Your task is to return the number of good subarrays of nums.

A good subarray is a contiguous subarray that contains exactly k distinct integers. For example, in the array [1,2,3,1,2][1, 2, 3, 1, 2], the subarray ...