LeetCode 274: H-Index | C# Solution | Sorting & Counting

📝 Solve the H-Index problem by finding the maximum value h where at least h papers have h citations! #leetcode #hindex #sorting #algorithms

⏱️ 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
07:54 - C# solution walk-through
08:44 - Solution analysis - runtime + memory

## KEY CONCEPTS
- Array manipulation
- Sorting techniques
- Binary search (alternative approach)
- Counting approach
- Academic metrics understanding

## MAIN LEARNING POINTS
- How to calculate an H-Index efficiently
- Optimizing algorithms with sorting
- Handling citation counts and paper metrics
- Implementing a concise C# solution

## RELATED PROBLEMS
- LeetCode 275: H-Index II (binary search variant)
- LeetCode 347: Top K Frequent Elements
- LeetCode 451: Sort Characters By Frequency
- LeetCode 692: Top K Frequent Words

## TARGET AUDIENCE
This video is perfect for software engineers preparing for technical interviews, C# developers looking to improve their algorithm skills, and computer science students learning about sorting algorithms and academic metrics.

## PREREQUISITES
- Basic understanding of C# syntax
- Knowledge of array manipulation
- Familiarity with sorting concepts
- Understanding of time & space complexity

## USEFUL LINKS

## ADDITIONAL TIPS
- Pay special attention to the definition of H-Index - it can be confusing at first
- Consider both sorting and counting approaches for different scenarios
- Watch how we handle the case where multiple papers have the same number of citations

💡 If you found this solution helpful, please LIKE the video and SUBSCRIBE for weekly LeetCode solutions in C#! Drop any questions or alternative approaches in the comments below - I respond to every comment! #csharp #codinginterview #algorithms #sorting #leetcode274

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💻 Full Solution Code Available!
You can find the complete C# implementation for this problem on GitHub:

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If any part of the solution needs clarification or if you have alternative approaches, drop a comment below! I’ll be happy to discuss.

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