📘Day 6 – Teacher's Day Challenge | Valid Parentheses | Stack + Hash Map

🗓️ Date: July 30, 2025 📌 Challenge:🔢 Problem: Valid Parentheses – LeetCode #20 (Easy)🎯 Topic: Stack, Hash Map, String 💻 Platform: Leetcode 🔗 Table of Contents Problem 1 – Valid Parentheses Daily Summary ✅ Problem Statement (Summary):Check...

The Call Stack - Hidden Foundation of Functional Programming

In computer science, the stack is an important concept. In reality also, the stack is a crucial part of the execution of an assembly program written in a higher-level language. From clicking a button on screen to sending a payload to space, the conce...

list vs массива

Ещё одна классическая функция Lisp, простая для понимания, но инициализируящая принципиальные аспекты организации памяти в вычислительной архитектуре. 5-ого января акцентируем класс и целых пять функций их банальным перечислением - maplist , lst? , l...

Day 5 Python 2024

Sure! Here's a brief overview of Linked Lists in Python to help you prepare for your interview. Linked Lists Overview A linked list is a linear data structure where each element is a separate object. Each element (node) of a list comprises two items:...

Understanding Java Stack for DSA

A Stack in Java is a data structure that follows the Last-In-First-Out (LIFO) principle. This means that the last element added to the stack will be the first one to be removed. The Stack class in Java extends the Vector class, which means it inherit...

Stack Data Structure

We covered array and linked lists in previous articles. Now we got a much simpler data structure "Stack". It represents a simple LIFO (The last-in, first-out) list which only allows you to extract/read items one by one starting from the last inserted...

STACKS in C++

WHAT IS STACK? It is a linear data structure and also an abstract data type ,where we can do only operation in a specific manner. It works on the LIFO (last in first out) or FILO (first in last out) system. LIFO means the elements which is inserted l...

Stacks 101: A Beginner's Overview

Introduction Whether it's items in a store or books in a library, once they become more than handful, people naturally start tidying things up by stacking them. When man started programming data, stack was one of the first structures that he thought ...

Data Structure & Algorithm l

Stacks

Inside This blog. Definition Operations Implementation in c++ Implementation in Python Implementation in Javascript Definition stack is a linear data type. Operations push() pop() isEmpty() isFull() peek() size() Implementation in C...