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In this problem, we need to decode the given string by repeatedly adding the total count number of times. We can have three different approaches to solving the problem, and we can use two stacks or one stack to solve the problem. Also, we can solve the problem without using the two stacks. Problem statement − We have given a string str containing the opening and closing brackets, alphabetical and numeric characters. We need to decode the string recursively. Here are the patterns or rules to decode the string. [chars] − The ‘chars’ should appear count times in ... Read More
In this problem, we need to count the total vowels and constants in the given linked list. We can traverse the linked list and check for each character, whether it is a constant or vowel. Problem statement − We have given a linked list containing the lowercase alphabetical characters. We need to count the total number of vowels and constants in the linked list. Sample examples Input 'a' -> 'b' -> 'e', 'c' -> 'd' -> 'e' -> 'f'’ -> 'o' -> 'i' -> 'a' -> 'a' Output Vowel – 7, constant - 4 Explanation − ... Read More
In this problem, we need to perform the given operations with each string prefix. In the end, we need to count the frequency of each character. We can follow the greedy approach to solve the problem. We need to take each prefix of length K and update its characters according to the given conditions. We can use the map to count the frequency of characters in the final string. Problem statement − We have given the strings tr containing the N lowercase alphabetical characters. Also, we have given the mapping list, which contains total 26 elements. Each element is mapped ... Read More
String manipulation and analysis are fundamental tasks in many programming scenarios. One intriguing problem within this domain is the task of finding the frequency of all substrings within a given string. This article aims to provide a comprehensive guide on efficiently accomplishing this task using the powerful Python programming language. When working with strings, it is often necessary to analyze their contents and extract valuable information. The frequency of substrings is an important metric that can reveal patterns, repetitions, or insights into the structure of the string. By determining how many times each substring appears in a given string, we ... Read More
In the world of natural language processing (NLP) and text manipulation, finding all possible space joins in a string can be a valuable task. Whether you're generating permutations, exploring word combinations, or analyzing text data, being able to efficiently discover all the potential ways to join words using spaces is essential. Through this process, we'll generate all possible combinations, enabling us to explore numerous word arrangements and gain valuable insights from our text data. Problem Statement Given a string of words, we want to generate all possible combinations by inserting spaces between the words. string = "hello world". To further ... Read More
In this problem, we will check if the linked list contains the string as a subsequence. We can iterate the list and string together to check whether a string is present as a subsequence in the linked list. Problem statement − We have given a string of size N. Also, we have given a linked list of the dynamic length containing the alphabetical characters. We need to check whether the linked list contains the string as a subsequence. Sample examples Input 'e' -> 'h' -> 'e' -> 'k' -> 'h' -> 'e' -> 'l' ->'o' -> 'l' -> 'o' ... Read More
Concurrent programming involves the execution of multiple threads or processes concurrently, which can lead to challenges such as race conditions and data inconsistencies. To address these issues, Python provides synchronization primitives, including the Lock and RLock objects. While both objects serve the purpose of controlling access to shared resources, they differ in behavior and usage. The Lock object is a fundamental mutual exclusion mechanism. It allows multiple threads to acquire and release the lock, but only one thread can hold the lock at any given time. When a thread attempts to acquire a lock that is already held by another ... Read More
In today's digital age, the ability to seamlessly convert between speech and text has become increasingly important. From voice-controlled assistants to transcription services, this functionality is in high demand across a wide range of applications. Python, with its extensive library ecosystem, offers powerful tools and APIs that make it relatively straightforward to implement speech-to-text and text-to-speech conversions. In this blog post, we will explore how to leverage Python to convert speech to text and text to speech, empowering developers to create innovative applications that bridge the gap between spoken and written communication. Converting Speech to Text The first step ... Read More
In this problem, we need to generate the Lyndon words of the length n using the given characters. The Lyndon words are words such that any of its rotations is strictly larger than itself in the lexicographical order. Here are examples of Lyndon words. 01 − The rotations of ‘01’ is ‘10’, which is always strictly greater than ‘01’. 012 − The rotations of ‘012’ is ‘120’ and ‘210’, which is strictly greater than ‘012’. Problem statement − We have given an array s[] containing numeric characters. Also, we have given n representing the length ... Read More
Python is a versatile and powerful programming language that allows developers to build a wide range of applications. However, like any programming language, Python is not immune to errors. One common error that developers encounter is the AttributeError. Let’s explore what an AttributeError is, why it occurs, and how to handle it effectively. What is an AttributeError? An AttributeError is an exception that occurs when an object does not have a particular attribute or method that is being accessed. It is raised when an invalid attribute reference or assignment is made to an object. Reasons for AttributeError An AttributeError can ... Read More