Pair Selection (CF EDU) | Binary Search on Real Numbers Explained Step-by-Step

In this video, we solve the **Pair Selection** problem from **Codeforces EDU Binary Search** module. This is a classic example of **binary search on real numbers** where we use mathematical transformation and priority queues to optimize the selection of `k` items to maximize average efficiency. We’ll cover: ✅ How to identify this as a binary search on answer ✅ How to derive the check function ✅ Binary Search with precision ✅ Time and space complexity ✅ Complete C++ implementation and logic walkthrough 📌 Problem Type: Binary Search on Real Numbers 📌 Level: Intermediate 📌 Concepts: Greedy, Priority Queue, Precision Binary Search 👨‍💻 Problem Link: https://codeforces.com/edu/course/2/lesson/6/4/practice/contest/285069/problem/C 💡 Ideal for practicing advanced binary search patterns used in real interviews. If you're enjoying the series, don’t forget to **like, subscribe, and comment** to support the channel! #BinarySearch #CodeforcesEDU #PairSelection