💡 Problem Formulation: How do we define a “weird” number in Python? A weird number is one that is odd and has a set of proper divisors (excluding itself) which sum up to more than the number itself. However, no subset of those divisors adds up to the number itself. For instance, if n is … Read more
💡 Problem Formulation: A Minimum Spanning Tree (MST) is a subset of the edges of a connected, edge-weighted undirected graph that connects all the vertices together, without any cycles and with the minimum possible total edge weight. The task is to find the MST using Prim’s algorithm. For example, given a graph represented as an … Read more
💡 Problem Formulation: The challenge is to devise a python program to minimize the Hamming distance between two equal-length strings after performing a series of swap operations. The Hamming distance is the count of differing characters between two strings. For example, given strings str1 = “abcde” and str2 = “axcye”, and permissible swap operations like … Read more
💡 Problem Formulation: In the classic board game of Snakes and Ladders, the aim is to travel from the start to the finish square as swiftly as possible, while navigating upward ladders that aid progress and downward snakes that hinder it. This challenges us to compute the minimum number of dice throws required to win … Read more
💡 Problem Formulation: Swapping nodes in a linked list is a common algorithm problem that involves rearranging the nodes so that their positions in the list are exchanged without actually modifying their data. If you’re given a linked list and two keys representing the nodes you need to swap, the desired outcome is the same … Read more
💡 Problem Formulation: Imagine a restaurant menu represented as a list of item prices. A “Good Meal” consists of two unique items whose total cost is a delicious number, a power of two. Given a list of item prices, our task is to count the number of distinct Good Meals that can be formed. For … Read more
💡 Problem Formulation: We’re given a set of points representing critical locations and a number of monitoring stations, k. The challenge is to ascertain whether these stations can monitor all the points effectively, assuming each station covers a specific range. For instance, inputting points as coordinates and k as 3 might output ‘True’ if 3 … Read more
💡 Problem Formulation: The challenge is to generate the lexicographically largest valid sequence given a set of constraints. This could be in the context of an array or string manipulation task where elements’ order matters. For example, if the input is a list of numbers, the desired output is a permutation of the list arranged … Read more
💡 Problem Formulation: The task involves calculating the maximum weighted sum of a rotated array. The weighted sum of an array is calculated by multiplying each element by a weight equal to its index (e.g., for array [a, b, c], the weighted sum is 0*a + 1*b + 2*c). Rotating the array means shifting its … Read more
💡 Problem Formulation: Imagine you have a list of numeric items and a function that calculates a ‘special value’ for each permutation of this list. Your task is to efficiently compute the average of all these ‘special values’. For instance, given a list [1, 2, 3], you might want to find the average of the … Read more
💡 Problem Formulation: You want to calculate the distance between two cities. For example, you have the names or coordinates of two cities, and you need a program to find the approximate distance in kilometers or miles. The output should be a numerical value representing the distance between these cities. Method 1: Using geopy library … Read more
💡 Problem Formulation: You’re tasked with writing a Python program to calculate the maximum score gained by sequentially removing given substrings from a string. Each removal awards different scores based on the substring. For instance, if you are given the string “ababbab” and substrings “ab” and “ba” with scores 2 and 1, respectively, a maximal … Read more