Count Elements Greater Than Previous Average | HackerRank Software Engineer Prep Kit
Let’s solve the "Count Elements Greater Than Previous Average" problem from the HackerRank Software Engineer Prep Kit using Node.js! 💻🔥
Welcome back to Techie Tay! In this video, we break down a classic array and running-average problem that frequently pops up in technical assessments and software engineering interviews.
If you’ve ever gotten tangled up tracking cumulative sums or managing time complexity while iterating through an array, this walkthrough is for you. We will implement a clean, optimal solution in JavaScript / Node.js.
📌 What we’ll cover in this video:
🧩 Problem Breakdown: Understanding how the "previous average" changes with each element.
💡 Algorithm Design: Avoiding the nested-loop trap by using a running sum.
🛠️ Node.js Implementation: Writing clear, modern JavaScript code step-by-step.
🧪 Edge Cases: What happens with empty arrays, negative numbers, or integer division?
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