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📌 Leetcode 1051 – Height Checker

In this video, we solve the Height Checker problem using an optimized Count Sort approach in Python.
The task: Count how many students are not standing in the correct order compared to their sorted heights.

👨‍💻 What You’ll Learn:

How to implement Count Sort for constrained value ranges

Comparing arrays without explicitly sorting

Real-world use of frequency arrays to optimize performance

🧠 Time & Space Complexity:

🔸 Brute Force:
⏱️ O(n log n) – Sorting + comparison
📦 O(n) – Storing sorted array

🔸 Count Sort Approach:
⏱️ O(n + k) – where k = range of heights (e.g., 1 to 100)
📦 O(k) – frequency array of size k

This is faster than traditional sort when the input range is limited!

🔗 Problem Link:
https://leetcode.com/problems/height-...

💡 Difficulty: Easy

💬 Comment if you’ve used Count Sort before or want help with variations of this approach!

🎯 Tags:
#leetcodearray #pythoncoding #dsaproblems #arrays #heightchallenge #sorting #leetcodeproblem #codinginterviewprep