Howto

💡 Problem Formulation: The challenge is to create a program that calculates the number of possible ways to make a certain amount of money (n rupees) using Indian currency denominations. In this article, we explore various methods to tackle this problem in Python. An example of input could be n = 10, and the desired … Read more

💡 Problem Formulation: We aim to determine the winner in a game where two players take turns to break a row of objects. The breaking sequence must be contiguous, and the player unable to make a move loses. For example, given a row represented by a string of “X”s (e.g., “XXXXXX”), players alternate removing 1-3 … Read more

💡 Problem Formulation: In combinatorics, the combinations of n objects taken r at a time is denoted as nCr or C(n, r). The challenge is to programatically find nCr for all possible values of r (0 to n) efficiently in Python. For instance, if n is 5, we want to find C(5,0), C(5,1), C(5,2), C(5,3), … Read more

💡 Problem Formulation: You’re tasked with writing a Python program to determine the winner of a rower reducing game. Given an array representing the strength of each rower and the rule that a rower can only challenge its immediate neighbor, the program should output the last remaining rower as the winner. For example, given the … Read more

💡 Problem Formulation: We need to calculate the total area that two overlapping or non-overlapping rectangles cover on a plane. Given the coordinates of the bottom left and top right corners of each rectangle, we should provide the sum of the areas of these rectangles minus the area of their overlap. For example, for two … Read more

💡 Problem Formulation: The task is to find the largest subsequence within an array such that every pair within that subsequence meets the ‘nice’ criteria (e.g., pairs having a specific relationship like being mutually prime, or one being a factor of the other). The input is a list of integers (e.g., [4, 6, 5, 2, … Read more

Understanding How to Find Modulus by Concatenating a Number N Times in Python 💡 Problem Formulation: We need to calculate the modulus of a number after concatenating it ‘n’ times. For instance, the number 12 concatenated 3 times becomes 121212. The goal is to compute the modulus of this new number with a divisor. If … Read more

💡 Problem Formulation: Imagine a scenario where you have a job sequence and you need to calculate the number of ways you can select sub-sequences from it. This kind of problem is common in scheduling, optimization, and combinatorics. For instance, from the job sequence \([A, B, C, D]\), we could select \([A, C]\) or \([B, … Read more

💡 Problem Formulation: We are tasked with determining whether a given number n can be expressed as the sum of k consecutive natural numbers. For example, if n = 9 and k = 2, the output should be True because 9 can be represented as 4+5. The challenge lies in finding an efficient algorithm to … Read more

💡 Problem Formulation: This article aims to explore methods for finding pairs of natural numbers that are co-prime to each other, with the additional constraint that their product equals a given number x. Specifically, if x is the input, the desired output is the count of such pairs. For example, given x=4, the number of … Read more

💡 Problem Formulation: When working with Binary Search Trees (BSTs), one may wonder how many structurally distinct BSTs can be created using ‘n’ distinct nodes. Each tree must uphold the property that left descendants are less than the node and right descendants are greater. Given an integer ‘n’, the goal is to compute the total … Read more

💡 Problem Formulation: This article focuses on the algorithmic challenge of determining the position of a ball after it has undergone a series of directional reversals. Given an integer n representing the number of reversals, the goal is to find the final position of the ball. For example, if the ball starts at position 1 … Read more