Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Solution: Subarrays with K Different Integers

Explore the sliding window technique to count subarrays containing exactly k distinct integers. Understand how to use two pointers and a frequency map to track unique elements, adjust the window size, and calculate the result with optimal time complexity. This lesson teaches an efficient approach to solving this classic problem with clear steps and code guidance.

We'll cover the following...

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 [1,2,3][1, 2, 3]contains 33 ...