Search⌘ K
AI Features

Solution: Subarrays with K Different Integers

Understand how to solve the problem of counting subarrays with exactly K distinct integers using the sliding window pattern. Explore how to apply two-pointer techniques and frequency maps to efficiently track distinct elements in a contiguous subarray. Learn to optimize time and space complexity while practicing a common coding interview pattern.

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] ...