📘 Day 42 – Teacher's Day Challenge | Calculating Function

🗓️ Date: September 26, 2025🧩 Platform: Codeforces🔢 Problems Solved Today: 1🎯 Focus Topic: Math, Alternating Series 🔗 Table of Contents Problem 1 – Calculating Function Daily Summary 🧩 Problem 1 – Calculating Function 📚 Difficulty: Easy🧠 ...