💡 Problem Formulation: Given an array of integers, we want to determine if the array has been sorted in non-decreasing order and then rotated about a pivot. A rotated array means that it may start from the middle of a sorted array and continue until the end, wrapping around to the beginning of the array. … Read more
💡 Problem Formulation: Given a list of integers, the goal is to calculate the sum of only the unique elements, where “unique” refers to those elements that appear exactly once within the list. For example, if the input is [7, 3, 5, 3, 4, 5], the unique elements are [7, 4], and their sum is … Read more
💡 Problem Formulation: Given a list or array of integers where each integer represents a ball labeled with a box number, the challenge is to write a program in Python that finds the maximum number of balls in any box. For instance, if the input is [1, 2, 1, 2, 1], the desired output is … Read more
💡 Problem Formulation: You’re given a time string where some of the digits are represented by “?” and you need to find the latest valid time that can be formed by replacing these hidden digits. For example, given the input “2?:?8”, a possible output could be “23:58”. It’s important to ensure that the time constructed … Read more
💡 Problem Formulation: We are set to find the number of rectangles within a collection that can be rearranged to form the largest possible square. Assume we are given a list of tuples with each tuple representing the dimensions of a rectangle (width, height). The goal is to identify how many of these rectangles can … Read more
💡 Problem Formulation: You are given an encoded array where the first element of the array encoded[i] is equal to arr[i] XOR arr[i + 1] for every i in the array. The task is to decode the array assuming you already know the first element of the original array arr. For instance, given the encoded … Read more
💡 Problem Formulation: When managing your finances, it’s vital to know the total amount you have in your bank accounts. This article explains how to write a Python program that could take a list of your bank account balances and sum them to find the total. For instance, if the input is [1500.00, 3000.00, 4500.00], … Read more
💡 Problem Formulation: The task is to develop a Python program that calculates the maximum number of units that can be loaded onto a truck given a limit to the truck’s capacity. Imagine we are given an array boxTypes, where boxTypes[i] = [numberOfBoxes_i, numberOfUnitsPerBox_i], and an integer truckSize, representing the maximum number of boxes the … Read more
💡 Problem Formulation: The task is to determine if two halves of a string have an equal number of vowels. The input is a string of even length, and the desired output is a boolean indicating if the halves are alike. For instance, given the string “bookend”, the first half “boo” and the second half … Read more
💡 Problem Formulation: When working with phone numbers in various formats, it’s often necessary to standardize them by reformatting. For instance, the input could be “(123) 456-7890” and the desired output might be “123-456-7890”. The following methods describe how to programmatically achieve this using Python. Method 1: Using Regular Expressions with re.sub() This method uses … Read more
💡 Problem Formulation: In a tournament where every team plays against every other team exactly once, the task is to count the total number of matches that will be played. Given an input of n teams, the desired output is the total count of matches. For instance, if there are 4 teams, the output should … Read more
💡 Problem Formulation: You’re given an array of strings and a string representing a set of allowed characters. The task is to count the number of strings in the array that consist only of the characters in the allowed set. For example, if your allowed set is “ab” and your array is [“ad”, “bd”, “aaab”, … Read more