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In this article, we'll delve into a fascinating problem that involves numbers and permutations: "Permutation of a number whose sum with the original number is equal to another given number". This problem offers a unique intersection of number theory and combinatorics, making it a compelling challenge to tackle. To clarify, given an original number and a target number, we need to find a permutation of the original number such that, when we add the original number and its permutation, we get the target number. Understanding the Problem In essence, this problem combines the concepts of number permutation, summation, and equality ... Read More
In this article, we will explore a common string manipulation problem: moving all digits to the beginning of a given string. This task is often seen in data cleaning or preprocessing, where we need to standardize or reformat strings in a certain way. A widely-used programming language celebrated for its efficiency and control. Problem Statement Given a string that contains alphanumeric characters, our task is to move all the digits present in the string to the beginning, while keeping the order of the rest of the characters the same. Solution Approach Our approach to solving this problem involves two key ... Read More
When working with strings, sometimes we need to modify them in specific ways to meet certain requirements. One such requirement is to modify a string by increasing each character by its distance from the end of the word. In this article, we will discuss an approach to solving this problem. Problem Statement Given a string S, modify the string by increasing each character by its distance from the end of the word. Approach To solve this problem, we can follow the following steps − Tokenize the given string S into individual words. Iterate over each word and for each ... Read More
In this article, we'll discuss an intriguing problem in string manipulation - "Minimum swaps required between two strings to make one string strictly greater than the other". We'll understand the problem, detail a strategy to solve it, implement it in C++, and clarify the concept with a relevant example. Understanding the Problem Statement Given two strings of equal length, our goal is to determine the minimum number of character swaps required to make one string strictly greater than the other. The characters are swapped between the two strings, and each swap operation involves exactly one character from each string. The ... Read More
Palindromes are sequences of characters that read the same forwards and backwards. In computer science and programming, palindromes are a common subject for string manipulation problems. In this article, we will explore the problem of finding the minimum size substring that must be removed from a given string to make it palindromic. We will include an example to illustrate the test case. Problem Statement Given a string 's' of length 'n', we need to find the minimum size of the substring that should be removed to make the remaining string palindromic. Algorithm Create a function isPalindrome that takes a ... Read More
In this article, we will delve into an interesting string manipulation problem: "Minimum replacements such that no palindromic substring of length exceeding 1 is present in the given string". This problem challenges us to calculate the minimum number of character replacements required to ensure that a given string contains no palindromic substrings of length more than 1. We will explain the problem and clarify the concept with an example. Understanding the Problem Statement A string is given to us, and our task is to determine the minimum number of character replacements needed to ensure that the string does not contain ... Read More
In this article, we will explore an intriguing computational problem - "Minimum number of digits required to be removed to make a number divisible by 4". This problem is a common one in coding contests and algorithm-based interviews and offers excellent practice for enhancing your problem-solving skills. First, let's understand the problem statement: We have a number, and our task is to remove the minimum number of digits such that the remaining number is divisible by 4. Conceptual Understanding The problem lies in the realm of number theory. One key fact to understand is that a number is divisible by ... Read More
In this problem, we will learn to find the count of minimum deletion required so that when we take the XOR of any two adjacent elements, we should either get 0 or 1. We will use the properties of the XOR operations to solve the problem. For example, when we take XOR of the same numbers, we always get 0; when we take XOR of the consecutive even and odd number, we get 1. Problem Statement We have given a num_str string containing the numeric digits. We need to count the minimum deletions required so that the XOR ... Read More
In computer science, string manipulation is an essential topic that involves operations such as concatenation, substring, reversing, and more. One common problem related to string manipulation is to remove all 0s from a binary string. In this article, we will discuss an algorithm to solve this problem using a minimum number of non-adjacent pair flips. Problem Statement Given a binary string, we have to remove all 0s from the string using the minimum number of non-adjacent pair flips. A flip is defined as selecting two adjacent characters and swapping them. In other words, we need to find the minimum number ... Read More
In this article, we delve into a fascinating problem of string manipulation and character encoding in computer science. The task at hand is to minimize the number of swaps between same-indexed characters of two strings to make the sum of ASCII values of characters in both strings odd. A robust and versatile programming language favored by many software developers. Understanding ASCII ASCII, short for American Standard Code for Information Interchange, is a character encoding standard for electronic communication. ASCII codes represent text in computers, telecommunications equipment, and other devices that use text. Problem Statement We are given two strings of ... Read More