Python

💡 Problem Formulation: In data analysis, it’s often necessary to categorize or filter data by time periods, and one such categorization involves determining the week of the year for given dates. For example, given a Pandas Series of dates, the goal is to derive a corresponding Series indicating the week number of the year for … Read more

💡 Problem Formulation: In this article, we aim to solve the problem of finding the length of the longest repeating substring within a given string in Python. If the input is “ababc”, the program should identify “ab” as the longest repeating substring and thus return the length, which is 2. Method 1: Brute Force Approach … Read more

💡 Problem Formulation: When working with time series data in Python, it’s common to encounter Period objects using pandas. The challenge is to extract the precise start time of a given Period object efficiently. For instance, knowing the start time of a fiscal quarter or the beginning of a month can be essential for date-based … Read more

💡 Problem Formulation: Given an array of words, the task is to find the length of the longest common prefix among these words. The solution should return 0 if there is no common prefix. For instance, with the input array [“flower”,”flow”,”flight”], the desired output is 2, as the longest common prefix is “fl”. Method 1: … Read more

💡 Problem Formulation: The task at hand involves computing the length of the longest consecutive subsequence within a list, such that each element in the subsequence is unique. For example, given the input [1, 2, 2, 3, 4, 1], the desired output would be 4, corresponding to the unique subsequence [2, 3, 4, 1]. Method … Read more

💡 Problem Formulation: In numerous computational problems, we are tasked with finding the longest path in a matrix, where the path is composed of adjacent (horizontally or vertically) cells with increasing values. Given a 2D matrix of numbers, the goal is to compute the length of the longest increasing path. For example, if the input … Read more

💡 Problem Formulation: You’re tasked to write Python code to determine whether a linked list is represented within the paths of a given binary tree. This problem is common in the intersection of data structures. For example, suppose you have a binary tree and are given a linked list [1 -> 5 -> 6]. The … Read more

💡 Problem Formulation: Given a binary tree, the task is to find the maximum sum of all values in any subtree that is also a Binary Search Tree (BST). The binary tree is a fundamental data structure consisting of nodes, where each node contains a value, and references to left and right child nodes. The … Read more

💡 Problem Formulation: This article dives into the challenge of determining whether a Binary Search Tree (BST) is embedded within a given Binary Tree (BT) using Python. The task requires an algorithm that identifies the BST structure amongst the nodes of a larger, unsorted BT. The input would be a constructed BT, and the output … Read more

💡 Problem Formulation: The task is to compute the kth largest product by pairing elements from two different arrays in Python. Consider you have arrays arr1 = [3, 5, 2] and arr2 = [4, 8, 1], and you need the 3rd largest product. Your program should efficiently output the result, which, in this case, is … Read more

💡 Problem Formulation: Determining intersections between lines is a common problem in computational geometry. Given a set of line segments, the task is to find out how many pairs of line segments intersect. For example, given four line segments represented by their endpoints (A1, B1), (A2, B2), (A3, B3), and (A4, B4), the output would … Read more

💡 Problem Formulation: When correcting a misspelled word, one common task programmers face is to determine how many characters need to be altered to transform the misspelled word into the correct one. This article offers five Python methods for computing this edit distance. For instance, converting “exampel” into “example” requires two character changes. Method 1: … Read more