Counting Sort Explained | Non-Comparison Sorting Algorithm | DSA Tutorial

Veröffentlicht am: 05 Februar 2026
auf dem Kanal: ShashCode

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Lecture Resources
https://github.com/Tiwarishashwat/Jav...

In this lecture, we will understand Counting Sort, a non-comparison based sorting algorithm that works efficiently when the range of input values is small.

Unlike algorithms like Quick Sort or Merge Sort, Counting Sort does not use comparisons and can achieve linear time complexity under the right conditions.

Topics covered in this video:

What is Counting Sort?

Why Counting Sort is different from comparison-based sorting

Working principle of Counting Sort

Frequency/count array concept

Step-by-step example of Counting Sort

Time and space complexity analysis

When to use Counting Sort

Limitations of Counting Sort

This lecture will help you understand sorting fundamentals and choose the right algorithm based on constraints, which is very important for DSA problems and interviews.

This video is part of my Java + DSA course by ShashCode, designed for:

DSA beginners

College students

Placement & interview preparation

Strong algorithmic foundations

👉 Watch till the end to clearly understand why Counting Sort can be faster than O(n log n) algorithms.

Timestamps:
0:00 - Counting Sort
6:40 - Code
13:10 - Outro

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