Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles by Siva Sai
Page 15 of 23
Modify string by inserting characters such that every K-length substring consists of unique characters only
A common task when working with strings is to make sure that a string adheres to certain conditions. One of these conditions could be to ensure that every substring of length K in the string contains unique characters only. This is a frequent requirement in problems related to data encoding, string manipulation, and cryptography. Problem Statement The problem we are trying to solve can be stated as follows − Given a string str and an integer K, modify the string by inserting characters such that every substring of length K in the string contains unique characters only. Proposed Solution We ...
Read MoreMinimum number of swaps required such that a given substring consists of exactly K 1s
Finding the minimum number of swaps required for a substring to contain exactly K 1s is a common problem in the realm of computer science and programming. In this article, we will delve deep into this problem and provide a C++ solution for it. This problem has its applications in various domains, including string manipulation, data structure optimization, and coding challenges in interviews. Problem Statement Given a binary string and a number K, the task is to find the minimum number of swaps required to ensure that every substring of the string has exactly K 1s. Approach To tackle this ...
Read MoreMinimum non-adjacent pair flips required to remove all 0s from a Binary String
In binary strings, flipping a pair of adjacent bits can easily remove a single 0 from the string. However, when we need to remove all the 0s from the binary string, we may need to flip non-adjacent pairs of bits as well. In this article, we will discuss how to determine the minimum number of non-adjacent pair flips required to remove all the 0s from a binary string. Algorithm To solve this problem, we will use a simple greedy algorithm. The idea is to always choose the pair of bits that are farthest apart from each other and have at ...
Read MoreMinimize length of a string by removing occurrences of another string from it as a substring
In this article, we delve into a challenging and interesting string manipulation problem in C++. The problem we're discussing today is "Minimize the length of a string by removing occurrences of another string from it as a substring". This problem is an excellent exercise in understanding strings, substrings, and algorithmic thinking. Problem Statement Given two strings, the task is to minimize the length of the first string by removing all occurrences of the second string from the first string as a substring. C++ Solution Approach Our approach will be to use the std::string::find and std::string::erase functions from the C++ Standard ...
Read MoreMinimize characters to be changed to make the left and right rotation of a string same
When working with strings, it's common to encounter problems that involve rotation, a process that reorders the characters in a string by moving a certain number of characters to the opposite end of the string. In this article, we will explore an interesting problem: how to minimize the number of characters that must be changed to make the left and right rotation of a string the same. We will provide a well-structured C++ solution and include an example to illustrate the test case. Problem Statement Given a string 's' of length 'n', we need to find the minimum number of ...
Read MoreMake all characters of a string same by minimum number of increments or decrements of ASCII values of characters
The ASCII (American Standard Code for Information Interchange) system is often used in programming to manipulate characters. In this article, we will be examining an interesting problem where we need to make all characters of a string same by the minimum number of increments or decrements of ASCII values of characters. We will provide a detailed explanation of the problem, propose an efficient solution in C++, and analyze its complexity. Understanding the Problem Given a string consisting of lowercase English letters, our task is to make all characters in the string the same by changing their ASCII values. The catch ...
Read MoreLexicographically smallest Palindromic Path in a Binary Tree
Binary trees are fundamental data structures in computer science, providing an efficient way to organize data hierarchically. When traversing these trees, we often uncover intriguing computational problems. Among these, identifying the lexicographically smallest palindromic path is a fascinating challenge. This article elucidates an effective C++ algorithm to solve this problem and provides a detailed example for better understanding. Problem Statement In a binary tree where each node represents a lowercase English letter, our objective is to discover the lexicographically smallest palindromic path. If several paths qualify, we can return any of them. If no palindromic path exists, we should return ...
Read MoreExtract URLs present in a given string
In the information age, it's common to encounter strings of text that contain URLs. As part of data cleaning or web scraping tasks, we often need to extract these URLs for further processing. In this article, we'll explore how to do this using C++, a high-performance language that offers fine-grained control over system resources. Understanding URLs A URL (Uniform Resource Locator) is a reference to a web resource that specifies its location on a computer network and a mechanism for retrieving it. In layman's terms, a URL is a web address. Problem Statement Given a string that contains several URLs, ...
Read MoreDifferent Ways to Generate String by using Characters and Numbers in Java
Generating strings that include characters and numbers is a common task in programming. Java provides several ways to generate such strings, and in this article, we will discuss some of the ways to generate strings using characters and numbers in Java. We will cover different approaches to generate random strings and string permutations using characters and numbers. Approach 1: Using Random Class to Generate Random Strings The Random class in Java provides a convenient way to generate random numbers and characters. We can use this class to generate random strings by generating a sequence of random numbers and mapping them ...
Read MoreClassify strings from an array using Custom Hash Function
In this article, we will delve into an interesting problem involving strings, hashing, and classification in C++. The problem statement is "Classify strings from an array using a custom hash function". This problem offers a great opportunity to learn about custom hash functions, their uses, and their applications in data classification and string manipulation. Problem Statement Given an array of strings, the task is to classify the strings into different categories using a custom hash function. Custom Hash Function A hash function is a function that is used to map data of arbitrary size to a fixed size. In our ...
Read More