Java and DSA Foundation Course - Problem Solving in 2D Arrays - 3 | Prefix Sum | Lecture 23 | Java and DSA Foundation Course

"After a series of classes on arrays, here we are with the final class. Hope that you are practicing the lecture problems and assignment questions. We recommend that you be regular with the classes and practice to gain the maximum out of this series. In this class, Manvi mam is going to cover the prefix sum concept-based problems on 2-D arrays. Interesting, isn't it? Let us meet in the class then! If you are facing any trouble accessing the assignment or lesson plan, please re-login to your account on PW Skills website and try. Are you finding the classes helpful? Stay tuned for more! Access the notes and assignments for this class for free at: https://bit.ly/3F5nU6P If you are joining us late, to know more about PWSkills & plans : Watch the Orientation Video: https://www.youtube.com/watch?v=YpNFgTKVAtU Watch the Launch Video: https://www.youtube.com/watch?v=si8TKULKmLE 00:00 - Introduction 00:45 - Recap 04:18 - For a given matrix 'a' of dimension nxm and coordinates (l1, r1) to (l2, r2), return the sum of rectangle from (l1, r1) to (l2, r2) 10:46 - Code 13:33 - Alternate method/ Method 2 24:18 - Code 34:20 - Alternate method/ Method 3 52:21 - Code 01:02:00 - Dry run 01:07:29 - Summary ▶️ PW Skills Website - https://pwskills.com ▶️ PW Skills Instagram - https://www.instagram.com/pwcollegewallah ▶️ PW Skills LinkedIn Channel - https://www.linkedin.com/in/pw-skills-136050249/ ▶️ PW Skills Telegram Channel- https://t.me/SkillsPW #CollegeWallah #PhysicsWallah #PWSkills #SkillstoLearn