Struggling with 2D Prefix Sum problems? 🤔
In this video, we break down the CSES Forest Queries problem step-by-step and help you master one of the most important concepts in competitive programming!
You’ll learn:
How to build a 2D Prefix Sum array
How to answer rectangle queries in O(1) time
Visualization + intuition for better understanding
Clean and optimized code walkthrough 💻
This problem is extremely important for HackWithInfy, placement prep, and competitive programming contests.
🚀 What You’ll Gain
✔ Strong grasp of 2D Prefix Sum
✔ Faster problem-solving skills
✔ Interview-ready approach
CSES, Forest Queries, Prefix Sum, 2D Prefix Sum, Competitive Programming, HackWithInfy, DSA, Coding Interview Prep
