LeetCode 274: H-Index | Python Solution | Sorting & Counting Approach

📝 In this video, I solve LeetCode's H-Index problem using sorting and counting techniques. The h-index measures a researcher's productivity and citation impact. #leetcode #sorting #arrays #pythonsolution ⏱️ **Time Complexity**: O(n log n) - dominated by the sorting operation 🗂️ **Space Complexity**: O(1) - constant extra space ## Timestamps 00:00 - Understanding problem statement 00:46 - Using Brute force 01:49 - Brute Force - Big O Notation 02:16 - Using Sorting approach 04:13 - Sorting approach - Big O Notation 04:45 - Optimized solution - Using Counters 07:12 - Optimal solution - Big O Notation 07:53 - Python code walk-through 08:54 - Solution analysis - runtime + memory 🔑 **Key Concepts**: - Sorting algorithms - Binary search application - Understanding citation metrics - Array manipulation techniques - Counting sort optimization 💡 **Main Takeaways**: - How to approach problems requiring ranked metrics - Efficiently calculating bibliometric indices - Optimizing sorting-based solutions - Handling edge cases in citation counting 📚 **Related LeetCode Problems**: - LeetCode 275: H-Index II (Binary Search) - LeetCode 347: Top K Frequent Elements - LeetCode 451: Sort Characters By Frequency - LeetCode 692: Top K Frequent Words 👨‍💻 **Target Audience**: Software engineering candidates preparing for technical interviews, particularly those focused on algorithmic problem-solving with Python. 📋 **Prerequisites**: Basic understanding of arrays, sorting algorithms, and Python syntax. ## Links - LeetCode problem: https://leetcode.com/problems/h-index/ - Solution code: https://leetcode.com/problems/h-index/solutions/6808290/array-sorting-solution-in-python-with-vi-6srb 🔔 If you found this tutorial helpful, please subscribe to the channel for weekly coding problems explained step-by-step! Drop your questions or alternative approaches in the comments section below. #codinginterviews #pythonprogramming #algorithmsandatastructures ## Additional Tips - Emphasize the definition of h-index, as it's not intuitive for many viewers - Discuss the O(n) counting sort solution as a follow-up optimization - Explain why sorting in descending order simplifies the solution logic