LeetCode 2149 | Rearrange Array Elements by Sign | Python Solution Explained | AlgoYogi

Welcome to **AlgoYogi**! In this video, we solve **LeetCode problem 2149: Rearrange Array Elements by Sign** using a clean and intuitive Python approach. This problem helps you sharpen your skills in **array manipulation**, **index placement**, and **pattern-based reordering** — often seen in interviews and data preprocessing tasks. 👉 **LeetCode Problem Link:** [Rearrange Array Elements by Sign - LeetCode 2149](https://leetcode.com/problems/rearrange-array-elements-by-sign/) --- ### 🚀 Timestamps 0:00 Introduction 0:20 Problem Explanation and Constraints 1:30 Two-Index Placement Strategy 6:30 Python Implementation 9:15 Time and Space Complexity --- ### 💡 Why Watch? - Learn how to **rearrange elements by alternating signs** - Use **two separate indices** to place positive and negative values correctly - Master a **simple O(n)** solution that’s readable and efficient --- ### 📢 Next Steps - Try solving this on LeetCode after watching - Explore similar array transformation problems like: - **Sort Array by Parity** - **Wiggle Sort** - **Even-Odd Reordering** - Drop your cleanest solution in the comments and challenge others! 👍 Like, 💬 Comment, and 🔔 Subscribe to **AlgoYogi** for clean Python tutorials and coding prep. #LeetCode #PythonSolutions #ArrayReordering #TwoPointers #AlgoYogi #CodingInterview