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DSDivya Sonawanedivyasonawane.hashnode.devMar 31 · 2 min read

My Student Life in Tech #2 — Why I Avoided DSA (At First)

Everyone kept saying: “DSA is important.” But no one told me how to start. So I avoided it. 🤯 The Fear Around DSA When I first heard about DSA, it already sounded difficult. Algorithms. Time compl

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SSSaptarshi Sarkarsaptarshisarkar.hashnode.devFeb 4 · 14 min read

Demystifying Time and Space Complexity for Beginners

Imagine you've just created an algorithm, and it works lightning-fast on your brand-new computer. You're thrilled with the results and can't wait to share your success, so you ask your friend to give it a try. However, when your friend runs the same ...

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AGARCHANA GURUSAMYarchana-code-diary.hashnode.devFeb 4 · 2 min read

Problem: Leet Code 7 - Reverse Integer

QUESTION: Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-2<sup>31</sup>, 2<sup>31</sup> - 1], then return 0. Assume the environment does not allow yo...

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SSSAHIL SAHUtherippedcoder.hashnode.devJan 21 · 3 min read

The How?

I spent months searching. I researched every roadmap, watched hundreds of videos on "How to Crack FAANG," and saved thousands of posts. It wasn't just a few days; it was months of commenting "link?" on Instagram, saving threads/posts I would never re...

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SSSaptarshi Sarkarsaptarshisarkar.hashnode.devJan 16 · 8 min read

What is Recursion? A Comprehensive Overview

A Problem Let’s start with a problem: I need to print first 10 natural numbers. There are several ways to solve this problem. But let's say we need to solve it using functions without using loops or calling a function more than once. The simplest way...

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SSSaptarshi Sarkarsaptarshisarkar.hashnode.devJan 10 · 4 min read

Cyclic Sort Made Simple: Learn the Basics and How It Works

Cyclic sort is an in-place and unstable sorting algorithm that is specifically designed to efficiently sort arrays where numbers are in a known range like from 1 to N. How does it work? Let’s take the following array as an example. We need to sort it...

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RRicharichak.hashnode.devJan 7 · 4 min read

Day 2: My Journey to Finding the Minimum Number in an Array

After solving the “find maximum number in an array” problem yesterday, I didn’t want to jump into something new immediately. I wanted to stay with the same concept and really let it sink in. So today, I picked the opposite version of the same problem...

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RRicharichak.hashnode.devJan 6 · 6 min read

Day 1: My Journey to Finding the Maximum Number in an Array

I'm starting my DSA journey, and honestly, I was looking for something simple enough that I wouldn't feel completely lost, but also something that would make me think a little. Finding the maximum number in an array seemed perfect—it's not scary, and...

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TATalha Ansariblog.talhaansari.inJan 5 · 4 min read

Learning DSA With Numbers

Counting Digits, Reversing Numbers, Palindromes, and Perfect Numbers Before arrays, before recursion, before graphs… most problems quietly begin with numbers. Digits. Place values. Division. Remainders. At first, these problems look simple. But once ...

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PJPRANAY JAISWALpranay180825.hashnode.devJan 2 · 3 min read

Everyone uses a HashSet for LeetCode 961. I found a way to use O(1) space by hacking Moore's Voting Algorithm. Here is the math behind it.

LeetCode 961: N-Repeated Element in Size 2N Array is usually solved with a simple Hash Set (O(N) space) or randomized checks. But recently, I challenged myself to solve it deterministically using O(1) space. The result? A modified version of Moore’s ...

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#dsainjava

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Trending tags this week

My Student Life in Tech #2 — Why I Avoided DSA (At First)

Demystifying Time and Space Complexity for Beginners

Problem: Leet Code 7 - Reverse Integer

The How?

What is Recursion? A Comprehensive Overview

Cyclic Sort Made Simple: Learn the Basics and How It Works

Day 2: My Journey to Finding the Minimum Number in an Array

Day 1: My Journey to Finding the Maximum Number in an Array

Learning DSA With Numbers

Everyone uses a HashSet for LeetCode 961. I found a way to use O(1) space by hacking Moore's Voting Algorithm. Here is the math behind it.