💡 Problem Formulation: Imagine you have been provided with a list of words and you want to determine the number of concatenated words present within that list. A concatenated word is defined as a word that can be constructed by concatenating two or more smaller words also present in the list. For example, if the … Read more
💡 Problem Formulation: You want to find out the nearest future time that can be formed by reusing the digits from a given time. For instance, if the time is “23:59”, the nearest time using those digits is “22:22” the next day. This article explores different methods to achieve this in Python. Method 1: Brute … Read more
💡 Problem Formulation: In the realm of stock trading, investors often need to determine the optimal time to sell their stocks for maximum profit. This article illustrates various Python programs that can compute the minimum number of days one must wait before selling stocks to make a profit. Given an array of daily stock prices, … Read more
💡 Problem Formulation: In this article, we explore how to generate all possible strings that can be typed using a traditional phone keypad. Each number (2-9) on a phone keypad corresponds to a set of letters. For example, 2 corresponds to “abc”. Given a sequence of number inputs like ’23’, we aim to find all … Read more
💡 Problem Formulation: The N Queens puzzle is a classic algorithmic problem where one must place N chess queens on an N×N chessboard so that no two queens threaten each other. A valid solution requires that no two queens share the same row, column, or diagonal. This article provides Python methods to verify if a … Read more
💡 Problem Formulation: Imagine a scenario in which we have a series of rooms locked and each room may contain keys to other rooms. Given a list of lists, where each sublist contains keys to other rooms, write a program to determine if we can unlock all the rooms. The input might look like [[1],[2],[3],[]], … Read more
💡 Problem Formulation: Given two arrays that represent the preorder and inorder traversals of a binary tree, the task is to reconstruct the original tree structure. Preorder traversal is a visitation order where the current node is processed before its child nodes, and inorder traversal processes the left subtree, the current node, and then the … Read more
💡 Problem Formulation: Checking for symmetry in geometric shapes can be performed algorithmically by analyzing point coordinates. In this article, we explore methods to determine if a given list of block representations, defined by their corner points, are symmetric with respect to the X-Y line. Say we have the input of coordinates [(1, -1), (-1, … Read more
💡 Problem Formulation: Given an unsorted list, the challenge is to determine the least number of consecutive sublists that can be independently sorted to make the entire list sorted. For example, given [3, 2, 4, 1, 5], the desired output is 3 because the list can be partitioned into sublists [3, 2], [4], [1, 5], … Read more
💡 Problem Formulation: Palindromes are strings that read the same forwards and backward. The challenge here is to find the number of ways a given palindrome can be split into two or more palindromes. For example, the input ‘ababa’ can be split into ‘a’, ‘bab’, ‘a’, or ‘aba’, ‘ba’, ‘aba’. The output for this input … Read more
💡 Problem Formulation: The task is to write a Python program that can generate all possible strings based on a set of characters at each position. For example, given input [[‘a’,’b’], [‘c’,’d’]], the desired output would be [‘ac’, ‘ad’, ‘bc’, ‘bd’]. Method 1: Itertools Product This method involves using the product() function from the Python … Read more
💡 Problem Formulation: We are tasked with determining the lowest maximum value of an array after performing exactly ‘k’ operations. Each operation consists of incrementing any element of the array by one. For example, given an array [3, 1, 5] and k=4, we aim to find the smallest possible largest number in the array after … Read more