Number of Recent Calls - LeetCode 933 | Easy | LeetCode Study Plan

🔥 LeetCode 933 – Number of Recent Calls | Full Explanation + Queue Solution | Day 27 In this video, we break down an easy but very practical Queue problem — Number of Recent Calls — and learn how to solve it step by step using the Queue data structure. This problem is great for beginners and teaches important concepts: 👉 How to track requests within a moving time window 👉 How to remove outdated elements efficiently 👉 How to use Queue for real-time counting problems 🧩 Problem Link: https://leetcode.com/problems/number-... 💡 What you’ll learn in this video: Understanding what the problem is asking How the recent 3000 milliseconds range works Why old requests need to be removed How to think about this problem using Queue Beginner-friendly step-by-step dry run JavaScript implementation explained simply Time and space complexity analysis ⚡ Approach Covered: 🔹 Queue Approach (Optimal Solution) Create a queue to store request timestamps Add every new request into the queue Remove all requests older than `t - 3000` Keep only valid recent requests Return the size of the queue as the answer 🚀 Why this problem is important? Strengthens Queue fundamentals Introduces sliding window thinking Teaches how to process real-time incoming data Common interview pattern for stream-based problems 🎯 If you found this helpful: 👍 Like the video 💬 Comment your doubts or suggest the next problem 🔔 Subscribe to jdcodebase for daily LeetCode & DSA content #leetcode #dsa #codinginterview #javascript #queue #numberofrecentcalls #algorithms #programming #jdcodebase #leetcode75 #day27 🚀