# Month: April 2021

## Check if the Sentence Is Pangram | LeetCode 1832 | Python | Solution

Click here to see the problem details. It’s an easy LeetCode problem with straightforward problem details. In a simple word, we will be given a sentence to check it is Pangram or not. So, what is Pangram? According to the problem description, “A pangram is a sentence where every letter of the English alphabet appears […]

## Seven Basic and Useful Commands in Linux

Intro First, Linux is Kernel, not Operating System (OS). There are so many OS based on Linux Kernel. Such as Ubuntu, Fedora, CentOS, etc. These are called Linux distribution or distro. By the way, the purpose of this blog is not about introducing Linux and Linux distro. We are going to know about seven very […]

## Valid Palindrome | LeetCode 125 | Python | Solution

Click here to see the problem details on LeetCode. Before solving this problem, we have to know about palindrome. According to the definition of Wikipedia: A palindrome is a word, number, phrase, or other sequence of characters which reads the same backward as forward, such as madam or racecar. Wikipedia The problem says that we […]

## Stack | Data Structure

Introduction ‘Stack’ is an abstract and linear data structure and one of the most basic data structures in Computer Science. It’s easy to learn. We will be going to know how Stack works and its implementation. This blog is dedicated to know about Stack data structure. Concept First of all, let’s think about a real-life […]

## Sum of Unique Elements | LeetCode 1748 | Python | Solution

Click here to see the problem details. Problem Overview This one is a very much simple problem. We have to find out the sum of all the unique values from an integer array. Nothing else, and we don’t have to check anything extra. Let’s see an example. In the above example, it’s clear that 5 […]

## Reverse Only Letters | LeetCode 917 | Python | Solution

Click here to see the problem details. Problem Overview The problem description is pretty precise. It says that we have to return the reverse version of the given string. But we can only reverse letters. Characters that are not a letter stay in the same place. Only letters will change their position. Let’s see an […]