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DSA

11 posts

Number of possible squares

Last Updated: 11 December 2025

Given an N × N chessboard. Find the total number of distinct squares that can be formed on this board.Note: A square can be of any size: 1×1, 2×2, 3×3, …, up to N×N.Exampl...read more

Last Updated: 08 December 2025

Given an array A[]. For each element A[i], We need to find the maximum value A[j] (where j ≠ i) that satisfies the condition A[j] ≤ 2*A[i].If no such value exists for a pa...read more

Last Updated: 08 December 2025

Given two arraysA[ ]andB[ ]. We can perform the following operation multiple times on the arrays:Select two integersiandj(i != j, 1 ≤ i, j≤ n).Increase A[i]and B[j]by 1 an...read more

Short Notes: Graph

Last Updated: 24 January 2026

Graph Data Structure is a non-linear structure used to represent relationships between objects. It consists of a set of vertices (nodes) connected by edges (links). Unlike...read more

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Balance Consonant and Vowels Ratio

Last Updated: 11 July 2025

You are given an array of strings arr[], where each string contains only lowercase English letters. Count the number of contiguous subarrays (i.e., one or more consecutive...read more

Powerful Integers

Last Updated: 05 July 2025

You are given a 2D integer array intervals[][] of length n and integer k, where each intervals[i] = [start, end] represents a closed interval (i.e., all integers from star...read more

ASCII Range Sum

Last Updated: 28 July 2025

Given a string s consisting of lowercase English letters, identify all characters whose first and last occurrences are at different positions.For each such character, comp...read more

Simple Steps to Learn Any Programming Language in 2025

Last Updated: 23 July 2025

Learning a Programming Language in 2025 could open endless possibilities. In today's world, where technology is used everywhere, the ability to speak to computers is not j...read more

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I Can't Use Logic In Programming. What Should I Do

Last Updated: 12 July 2025

Are you a new developer and recently stepped into programming?You might be getting frustrated when you see that you don't get logic in programming, and you don't know how ...read more

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Programming Language

Competitive Programming

Visual Cryptography | Introduction

Last Updated: 05 June 2025

The internet has become an essential part of our lives, but with its rapid growth, protecting sensitive information has become increasingly important. Cryptography is the ...read more

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Computer Networks

The Google Foo Bar Challenge

Last Updated: 28 July 2025

In the world of tech, some things are meant to remain a mystery, and the Google Foo Bar Challenge is one of them. Imagine being invited to a secret coding competition, not...read more

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Competitive Programming

Competitive Programming