💡 Problem Formulation: Web scraping is a common task in data gathering, and fetching hyperlinks from a webpage is a foundational aspect of it. This article elucidates how to efficiently extract all href attributes from anchor tags in a webpage using Selenium with Python. For instance, we might have a webpage with numerous links and … Read more
💡 Problem Formulation: A bitonic sequence is an array of integers that starts off with an increasing order of elements and then transitions into a decreasing order. The highest value in this sequence is referred to as the “bitonic point”. This article aims to demonstrate how to find that point efficiently in Python. For instance, … Read more
💡 Problem Formulation: We frequently encounter situations where we need to simulate or track the process of a sorting algorithm. This can be particularly important for educational purposes, algorithm analysis, or optimization tasks. In this case, the challenge is to perform an array sort using precisely ‘k’ calls to a merge sort function in Python. … Read more
💡 Problem Formulation: We want to identify an integer x such that x divides every element of an array except for exactly one element. For instance, given the array [15, 3, 6], the integer 3 is a divisor for all elements except for the number 6, making it our target output. Method 1: Brute Force … Read more
💡 Problem Formulation: The challenge is to locate a position within an array such that the product of elements in the subarray to the left is equal to the product of elements in the subarray to the right. Given an input array like [1, 2, 3, 6, 5, 6], the desired output is the index … Read more
💡 Problem Formulation: You have an array where initially, the sequence of elements decreases and then strictly increases, or vice versa—formulating a “turning point” or “peak” in the sequence. The task is to identify the index of this turning element. For instance, with an input array [5, 4, 3, 2, 3, 4, 5], the output … Read more
💡 Problem Formulation: The challenge is to rebuild a binary tree given its inorder and postorder traversal results. In binary tree construction, the inorder sequence lists nodes in the left subtree, the root node, and then nodes in the right subtree, whereas the postorder sequence lists nodes in the left subtree, nodes in the right … Read more
💡 Problem Formulation: Given a postorder traversal of a binary search tree (BST), the task is to reconstruct the original BST. The postorder traversal is a sequence of values visited as per postorder traversal of the BST. For instance, if the input postorder array is [1, 3, 2, 5, 7, 6, 4], the desired output … Read more
💡 Problem Formulation: A primorial prime is a prime number that is one less or one more than a primorial. The primorial of a number is the product of the first n primes. Our objective is to determine whether a given number is a primorial prime. If we take the input 30, for example, the … Read more
💡 Problem Formulation: What is an Achilles number? An Achilles number is a number that is powerful, meaning all of its prime factors are squared, but it is not a perfect power (i.e., it cannot be expressed as m^n for any integers m > 1 and n > 1). In this article, we explore five … Read more
💡 Problem Formulation: The task is to identify all unique substrings within a provided string that read the same backwards as forwards, known as palindromes. For example, given the input string “aabbbaa”, the desired output should be a set of distinct palindromes such as {“a”, “aa”, “b”, “bb”, “bbb”, “abbba”, “aabbbaa”}. Method 1: Brute Force … Read more
💡 Problem Formulation: In Python, checking if a number is a “Trojan number”—a number that remains the same when its digits are squared and concatenated—requires specific checks and computations. The goal is to input a number and determine whether it is a Trojan number. For instance, the input 248 should return True since squaring and … Read more