L4. Prefix Sum || 25 DSA Patterns || New & Easy way to Master DSA || Crack DSA Round || Crack FAANG

One and only 25 DSA Patterns Playlist: https://youtube.com/playlist?list=PLh_njhZ_MgInazcDWlX1RlpwIIYACSyIJ&si=7ScE4-8L6XjZn7md
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One and only 25 DSA PATTERNS Playlist YouTube.
25 DSA PATTERNS for Coding Interviews – Crack Any Problem with These!

Notes & Practice Questions: https://drive.google.com/file/d/1ogmzdHarYYNBgVSoDZJb1TbpCDJA6H4E/view?usp=sharing

In this video, we dive deep into the Prefix Sum pattern – a powerful and efficient technique used to solve a variety of problems on arrays.

We'll cover:

When and why to use Prefix Sum
Step-by-step examples with dry runs

Common problems like:

Find pivot index
Subarray sum equals K
Continuous subarray sum

Time Stamps :

00:00 - Intro
00:19 - Definitions
09:15 - 1.Find pivot index
18:48 - 2.Subarray sum equals K
30:24 - 3.Continuous subarray sum
Top 150 DSA Coding Questions List with Leetcode Links:
https://drive.google.com/file/d/1Nfq97UIGoXEiyuEUpYLzjARN_quVoxpQ/view?usp=sharing

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