Forward and backward iterations in Python Imagine your in a situation that needs to go through the elements of a list in backward order. To achieve this we need to read the last element first and then the last but one and so on till the element at index 0…

Problem statement: Given a string s consisting of open and closed brackets "(" and ")", return the length of the longest substring in s that is a valid string of parentheses. Example 1 Input s = ")(())(()" Output 4 Explanation "(())" is the longest substring with valid parentheses. Naive approach: Find all…

Approach1: Simple algorithm n := row count of matrix if n <= 2, then return sum of all elements in matrix first_row := sum of first row last_row := sum of last row diagonal = sum of matrix[i, n-1-i] for all i from 1 to n-2 return first_row + last_row…

Question: You are given a lowercase alphabet string text. Return a new string where every character in text is mapped to its reverse in the alphabet, so that a becomes z, b becomes y, c becomes x, and so on. Example 1 Input text = "abcdef" Output "zyxwvu" Algorithm Find a new…

Given two integers x, and y return the number of positions where their values differ in their binary representations as a 32-bit integer. Example 1 Input x = 9 y = 5 …

OOP is the most popular way of analysing, designing, and developing application systems, especially on complex scientific computing software systems. The perspective that views the elements of a given situation by decomposing them into objects and object relationships. This approach used to design modular and reusable software systems. What is…

Computer Science actually came from Mathematics. Many mathematicians are programmers that have written their programs in the words of Mathematics, using mathematical notation. As mathematicians’ problem-solving techniques became more sophisticated and the problems they were solving became more complex, they were interested in finding automated ways of solving these problems…

How to do this using programming? What on earth is a pangram? A pangram is a sentence or expression that uses all the letters of the alphabet. …

What is the fuzz about microcontrollers? The generic definition of a microcontroller is a small, low-cost and self-contained computer-on-a-chip that can be used as an embedded system. A microcontrollers work at clock rate frequencies, which usually include: An 8 or 16 or 32 or 64 bit microprocessor. A little measure…