Count the Number of Good Subarrays | Thought Process | Khandani Template | Leetcode 2537 | MIK
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Hi Everyone, this is the 38th video of our Playlist "Sliding Window : Popular Interview Problems".
Now we will be solving a good sliding window problem - Count the Number of Good Subarrays | Thought Process | Khandani Template | Leetcode 2537 | codestorywithMIK
We will see detailed analysis on the thought process of the problem.
Problem Name : Count the Number of Good Subarrays | Thought Process | Khandani Template | Leetcode 2537 | codestorywithMIK
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My solutions on Github(C++ & JAVA) - https://github.com/MAZHARMIK/Interview_DS_Algo/blob/master/Sliding Window/Count the Number of Good Subarrays.cpp
Leetcode Link : https://leetcode.com/problems/count-the-number-of-good-subarrays
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Video Summary :
The approach uses a sliding window to efficiently count subarrays with at least k good pairs (equal element pairs). As the window expands, a hashmap tracks frequencies to calculate how many new pairs are formed. Once the pair count meets or exceeds k, all subarrays ending at the current position are valid. The window then shrinks from the left to find other possibilities. This avoids brute-force checks and keeps the solution optimal.
✨ Timelines✨
00:00 - Introduction
0:13 - Motivation
0:27 - Problem Explanation
2:16 - Thought Process
9:34 - Important Point + Dry Run Example
19:10 - Coding it up
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