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Solution: Subarrays with K Different Integers

Explore how to solve the problem of counting subarrays with exactly k distinct integers using the sliding window pattern. Understand how to manage pointers and frequency maps to optimize and achieve a linear-time solution. This lesson helps you implement an effective strategy for a common interview coding problem involving arrays and distinct element counts.

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] ...