3623. Count Number of Trapezoids I | Leetcode Daily - Python

Struggling with geometry problems on LeetCode? Watch this breakdown of "Count Number of Trapezoids I". We simplify this 2D plane problem into a straightforward counting task using Hash Maps and Combinatorics. Learn how to identify horizontal trapezoids by grouping points by height and applying the nC2 formula. We also cover a crucial optimization: using a running sum technique to pair edges efficiently, reducing the time complexity from O(N^2) to linear O(N). Whether you use Python, Java, C++, or JavaScript, this step-by-step tutorial covers the logic and full code implementation to help you ace your coding interview. 🧋 Support the channel! My Daily To Do: https://www.mydailytodo.com/ Buy Me A Boba: https://www.buymeaboba.com ✍️ My Planning Tools (Affiliate Links) I use a tablet to sketch out data structures and logic before coding. Using these links helps support the channel at no extra cost to you! Latest S-Pen Tablet: https://amzn.to/4nsgXRw Great Budget Tablet: https://amzn.to/4ow4v3Y Perfect for coding interview preparation and improving problem-solving skills. 👍 Like, Subscribe, and Comment! Let me know what problems you'd like to see solved. Solution Link: https://leetcode.com/problems/count-number-of-trapezoids-i/editorial/ #leetcode #python #algorithms #codinginterview #dailycoding