💡 Problem Formulation: The task is to write a Python program to remove characters from a string if they have appeared earlier in the string. Consider the input string “interviewquery” as an example. The desired output after removing duplicate characters that have occurred before would be “intervwquy”. Method 1: Using OrderedDict This method involves using … Read more
💡 Problem Formulation: Given a text input, the goal is to develop a Python program that can count the number of distinct words and determine the frequency of each word. Imagine processing the string “apple orange banana apple apple banana”. The desired output would list ‘apple’ with a frequency of 3, ‘orange’ with a frequency … Read more
💡 Problem Formulation: Imagine you are working with a table of data in Python, and you need to sort this table based on one of its attribute indexes. Whether you’re managing user data, sales figures, or any other dataset, sorting can help you organize and analyze your information efficiently. For instance, you have a list … Read more
💡 Problem Formulation: Determining the perimeter of a polygon is a fundamental geometric problem, which involves calculating the sum length of all the sides of the polygon. For instance, given the coordinates of a pentagon’s vertices, the goal is to compute the total distance around its five edges. This article explores various Python methods to … Read more
💡 Problem Formulation: Complex numbers, used extensively in engineering and science, consist of a real part and an imaginary part. For example, 3 + 4i is a complex number with the real part being 3 and the imaginary part 4i. This article explores how to create a Python class that can handle complex numbers, allowing … Read more
💡 Problem Formulation: Prefix compression involves reducing two input strings to their common beginning, followed by the two unique remainders. Given strings ‘string1’ and ‘string2’, the goal is to identify the common prefix and output a tuple: (length_of_common_prefix, unique_part_of_string1, unique_part_of_string2). For example, for ‘interspecies’ and ‘interstellar’, the desired output would be (5, ‘species’, ‘stellar’). Method … Read more
💡 Problem Formulation: String compression is a common programming challenge where the goal is to reduce the size of a string by replacing consecutive repeats of characters with the character followed by the count of repeats. For instance, the input ‘aabcccccaaa’ should yield an output of ‘a2b1c5a3’. Method 1: Using Loops This method involves iterating … Read more
💡 Problem Formulation: Often in programming, there’s a need to calculate the amount of time that has elapsed between two points. For example, you might want to know the difference between timestamps ‘2023-03-01 14:00:00’ and ‘2023-03-01 16:30:00’. The desired output would be a representation of this time difference, such as ‘2 hours, 30 minutes’ or … Read more
💡 Problem Formulation: Given a string, the challenge is to divide it into k distinct partitions such that each partition is as even as possible. For instance, if the input string is “aabbccdd” and k = 4, the desired output would be [“aa”, “bb”, “cc”, “dd”]. This article explores various methods to achieve this partitioning … Read more
💡 Problem Formulation: In the Minion game, two players create words from a given string. The player with the most points wins. A vowel opening a word scores points equal to the remaining length of the string. The task is to write a Python program that computes the scores and declares the name of the … Read more
💡 Problem Formulation: In Python, you may often need to manipulate list items. A common task is updating a list so that each element becomes the absolute value of the original element. For instance, given the input list [1, -4, 3, -2], the desired output would be [1, 4, 3, 2]. This article explores five … Read more
💡 Problem Formulation: Finding a better or ‘best’ divisor of a number means finding a divisor which is neither too high nor too low in its value. In an ideal situation, we strive to find divisors that are close to the square root of a number to avoid pairing small with large divisors. For instance, … Read more