We would like to show you a description here but the site won’t allow us. have had on how we consume written Vowel Substring Hackerrank Solution. SQL (Basic) Skills Certification Test. Solve Me First. You switched accounts on another tab or window. Share. The first step is to extract all maximum length sub-strings that contain only vowels which are: aeoi. So for instance if my String is : "Hi I have a dog named Patch", the printed substring would be. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for. "Vowel Substring Hackerrank Solution" our focus shifts to the heart of the Vowel Substring Hackerrank Solution experience—the digital library. java","contentType":"file"},{"name":"Arrays_LeftRotation. TOPICS: Introduction. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/unexpected-demand":{"items":[{"name":"test-cases","path":"certificates/problem. Please let me know if the certificate problems have changed, so I can put a note here. Problems with similar vi values are similar in nature. 09. Store the substring as answer = s [0:k] and make the max_vowel_count = count. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright. Get started hiring with HackerRank. Continue. What You Will Learn Develop complex RESTful APIs from scratch with Python combined with and without data sources Choose the most appropriate (micro) framework based on the specific. 72%. split (' '); const longest = separateVowels. You must check the stringstream hackerrank solution. Output: -1. md","path":"README. And it almost works like I want it to. We have a function called avg that takes in a variable number of integer inputs. Follow. Here is one question from hackerrank, I have a solution but there is some testcase failed because time limit exceeded. For example ‘abc’, ‘acb’,‘bca’,‘cab’,‘cba’,‘bac’ all are anagrams of ‘abc’. Example: Input: String="araaci", K=2 Output: 4 Explanation: The longest substring with no more than '2' distinct characters is "araa". Key Competencies: Data Structures - Use sata structures such as hash maps, stacks. Please be careful during the. As very lower and upper case vowels have the same 5 LSBs. Output: 4. py","path":"06_SI_Basic-Hackerrank/01_Max. Find the end of the substring j = i+length-1. But “eeks” is lexicographically smallest. This is a better and efficient way to check and find the number of each vowel present in a string. If we see a character that is not a. def Check_Vow (string, vowels): string = string. Example 1: Input: s = "abciiidef", k = 3 Output: 3 Explanation: The. # # The function is expected to return a LONG_INTEGER. A string is a substring (or factor) of a string if there exists two strings and such that =. {"payload":{"allShortcutsEnabled":false,"fileTree":{"Skills Certification/Problem Solving - Basic":{"items":[{"name":"01 - String Anagram. md","path":"README. Two strings are anagrams of each other if the letters of one string can be rearranged to form the other string. I had about 50 sprites on the screen and couldn't even manage 20 fps because the garbage collector was taking up all the CPU time. More than 100 million people use GitHub to discover, fork, and contribute to over 330 million projects. This repository consists of JAVA Solutions as of 1st April 2020. aaeiouu. Day 2: Operators. The following is an incomplete list of possible problems per certificate as of 2021. find maximum pair of dumbbell weights whereby pairs can have difference of max 1. August 2023 (4) July 2023 (1) April 2023. given an array of n elements containing the count of (i+1) dumbbell weights. Certificates. Feel free to use my solutions as inspiration, but please don't literally copy the code. Vowel letters in English are (a, e, i, o, u). Challenge Walkthrough Let's walk through this sample challenge and explore the features of the code editor. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/balanced-system-files-partition":{"items":[{"name":"test-cases","path. Strings. We have to find the maximum number of vowel letters in any substring of s with length k. sql. To traverse through the length of a string, use a for loop: for i in range (0, len (s)): print (s [i]) A range function is used to loop over some length: range (0, 5) Here, the range loops over to . Because it already generates all substrings of the original string, in which string [i] is the first character of the given substring. Either way, a simple regular expression can get the characters you need. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"README. Try Sample Test. py","contentType":"file"},{"name":"String. Count the number of vowels occurring in all the substrings of given string. . 4 Vowel Substring Hackerrank Solution 2023-01-30 advantage of the various frameworks of Python. Day 0: Hello, World. Count of binary strings of length N having equal count of 0's and 1's and count of 1's ≥ count of 0's in each prefix substring. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/vowel-substring":{"items":[{"name":"test-cases","path":"certificates/problem. py","path":"Gaming Laptop Battery Life. 1 4: The substrings of abaa are a, b, ab, ba, aa, aba, baa, and abaa, so we print on a new line. We would like to show you a description here but the site won’t allow us. Exception Handling. More than 3,000 tech teams, representing all industries and from countries around the world, trust HackerRank. . Day 4: Class vs. Write A Program To Find Character Is Vowel Or Not,c program to check vowel or consonant using switch, write a program to determine whether the input character is a vowel or consonant or not an alphabet, c++ program to find number of vowels in a string,. Solving code challenges on HackerRank is one of the best ways to prepare for programming interviews. A simple solution is to generate all substrings. PasswordDecrypt. Return the maximum number of vowel letters in any substring of s with length k. Now, on a simple tutorial, drawing just a couple bitmaps, this is fine. A move consists of appending a letter to exactly one of these strings: either to A' or to B'. To associate your repository with the hackerrank-certificates topic, visit your repo's landing page and select "manage topics. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/parallel-processing":{"items":[{"name":"test-cases","path":"certificates. Your task is to find the k th element of the -indexed lexicographically ordered set of substrings in the set S. Solution in Python: #!/bin/python3 import math import os import random import re import sys # # Complete the 'getMinCost' function below. New Year Chaos. nextInt (); int endIndex = input. Flipping the Matrix. This repository consists of JAVA Solutions as of 1st April 2020. The vowels are [a, e, T, b: A substring is a contiguous group of characters in the string. Vowel Substring Given a string of lowercase letters in the range ascia-23, determine the number of substrings that can be created where every letter is a vowel and every vowel is present at least once. A substring is a contiguous (non-empty) sequence of characters within a string. 4. A simple solution is to generate all substrings. {"payload":{"allShortcutsEnabled":false,"fileTree":{"Problem solving & Exercises/HackerRank/Certificates/Problem Solving (Basic)/parallel-processing":{"items":[{"name. Course Schedule IV 1463. . Do you have more questions? Check out our FAQ. C Program To Convert String To Integer Without Using Library Functions. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/nearly-similar-rectangles":{"items":[{"name":"test-cases","path":"certificates. Problem Solving (Basic) Active Traders; Balanced System Files Partition; [email protected]","contentType":"file"}],"totalCount":1. # The function accepts following parameters: # 1. index = 0. 3. " GitHub is where people build software. We recommend you to try the sample test for a couple of minutes, before taking the main test. Input: s = "abciiidef", k = 3 Output: 3 Explanation: The substring "iii" contains 3 vowel letters. N which you need to complete. " GitHub is where people build software. On the way back to the starting point,the taxi driver may pick up additional passengers for his next trip to the airport. Domains Basic Select ChallengesThen by mapping with the len, you're taking the len of each item in the list: And finally by taking the max you'll find the longest sequence of vowels in the list. How can we help you? Home; About. Case 2: i th character is vowel if i th character is vowel, then it can be preceded by at most k-1 vowels No of choices for vowels, n = 5 dp[i][0] = (no of strings of length i with at most k consecutive vowels such that last character is a vowel) + (no of strings. You are required to determine the substring with highest number of vowels . Mean, Var and Std – Hacker Rank Solution. A' is always a substring of A and B' is always a substring of B. However, some test cases on hackerrank had timed out, so please suggest the. 1 of 6 Review the problem statement Each challenge has a problem statement that includes sample inputs and outputs. Note: Due to the large constraints, the answer may not fit in a signed 32-bit integer. Initialize a variable start to 0. join (""); console. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/maximum-cost-of-laptop-count":{"items":[{"name":"test-cases","path. This is the best place to expand your knowledge and get prepared for your next interview. for c in 'eiyäöaåuo': assert vowel_character (c. count = 0. player B wins. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/active-traders":{"items":[{"name":"test-cases","path":"certificates/problem. Generate a string whose all K-size substrings can be concatenated to form the given string. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/vowel-substring":{"items":[{"name":"test-cases","path":"certificates/problem. To review, open the file in an editor that reveals hidden Unicode characters. Linux, macOS, Windows, ARM, and containers. Generate a string whose all K-size substrings can be concatenated to form the given string. Solution in Python: #!/bin/python3 import math import os import random import re import sys # # Complete the 'findSum' function below. Example s="aeloaexaaeulou There is a substring to the. {"payload":{"allShortcutsEnabled":false,"fileTree":{"Skills Certification/Problem Solving - Basic":{"items":[{"name":"01 - String Anagram. I want to write a function that scans a string for any vowels. In this HackerRank java substrings problem in java programming Given a string, s, and two indices, start and end, print a substring consisting of all characters in the inclusive range from start to end - 1. org on 2020-02-13 by guest the implementation language, while also providing intuition and analysis of fundamental algorithms. Learn more about bidirectional Unicode characters. After going through the solutions, you will be able to understand the concepts and solutions very easily. We will send you an email when your results are ready. Let m and n be the lengths of the first and second strings respectively. js This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. With the asserts here however. Please be careful. I used the code stubs provided by HackerRank, so don't mind the unnecessary imports, naming convention and so on. Now, the count of vowels in the range [L, R] can be easily calculated. There are 1 question that are part of this test. ^ and $ anchor the match to the beginning and end of the value. If there is no element , return INVALID. Day 5: Loops. {"payload": {"allShortcutsEnabled":false,"fileTree": {"certificates/problem-solving-basic/vowel-substring": {"items": [ {"name":"test-cases","path":"certificates/problem-solving-basic/vowel-substring/test-cases","contentType":"directory"}, {"name":"README. py","path":"06_SI_Basic-Hackerrank/01_Max. window. HackerRank is the market-leading coding test and interview solution for hiring developers. of vowels = 3. Vowel letters in English are 'a', 'e', 'i', 'o', and 'u'. Run directly on a VM or inside a container. md","path":"README. In this string sub-domain, we have to solve the string-related challenges. For example, your strings are . Here is my. Write a SQL query to get all cities starting with vowels from the STATION table using LOWER () and SUBSTRING () functions. Hackerrank Problem Solving(Basics) Solutions | Hackerrank Free Courses With Certificate | Hackerrank#Hackerrank#LetsCodeAbout this video:In this Video you wi. There are 1 question that are part of this test. Change Theme. Contains Solutions of HackerRank Certification in Python Basics. Here is my solution : the longest substring always start with the first vowel and end with the last consonant. Questions Feel free to choose your preferred programming language from the list of languages supported for each question. if false move to next iteration. we need to count how many strings of length L are recognized by it. Feel free to use my solutions as inspiration, but please don't literally copy the code. 17. Follow the steps mentioned below to implement the idea: Maintain a boolean table[N][N] that is filled in a bottom-up manner. substringDiff has the following parameter (s): k: an integer that represents the maximum number of differing characters in a matching pair. Each of the next lines contains a string, string contains both lower case and upper case . md","contentType":"file"},{"name":"balanced_system_file_partition. '); I expect that only those city names which both start and end with a vowel should not be displayed but in the first query all the city names are being displayed and in the second one all the city names starting with a vowel are not displayed. In today digital age, eBooks have become a staple for both leisure and learning. If yes increment count. Participants are ranked by score, with the cumulative time taken (between the contest's start time and the time of your correct. Count the number of substrings within an inclusive range of indices. c","path":"Bitwise. Viewed 802 times 0 I have to write a program that takes a String as user input and then prints a substring that starts with the first vowel of the String and ends with the last. Hackerrank certification question. String Hackerrank C++ Solutions. com like an old school people. In this HackerRank Two Strings Game problem solution there are two strings A and B. Problem Solving (Basic) certification | HackerRank. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"HackerRank Problems","path":"HackerRank Problems","contentType":"directory"},{"name":"2D. # If there are no vowels in the input string, return the string 'Not found!' without quotes. You are given a randoms string containing only lowercase letters and you need to find if the string contains ALL the vowels. Vowels of All Substrings - Given a string word, return the sum of the number of vowels ('a', 'e', 'i', 'o', and 'u') in every substring of word. You've arranged the problems in increasing difficulty order, and the i th problem has estimated difficulty level i. Here, ANA occurs twice in BANANA. Given a string s and a number k, find the maximum number of vowels in any substring of size k. Python (Basic) Get Certified. java. Hackerrank Certification. java","path":"Arrays_2D. HackerRank Count Strings problem solution. If you submitted more than one solution for a problem, only your highest score achieved will be used in this calculation. Now the last step is to swap both strings' first characters so we can find our desired solution. {"payload":{"allShortcutsEnabled":false,"fileTree":{"06_SI_Basic-Hackerrank":{"items":[{"name":"01_Max Element in the Array. Data Structures. We calculate, Success ratio , sr = correct/total. Suppose we have a string in lowercase alphabets, we have to find substrings that contain all the vowels at least once and there exist no consonants in that substrings. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"README. A vowel substring is a substring that only consists of vowels ('a', 'e', 'i', 'o', and 'u') and has all five vowels present in it. Initially, some strings A' and B' are written on the sheet of paper. Vowels: ['a', 'e', 'i', 'o', 'u'] Naive Approach. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"Prime no. # Check if a letter is a Vowel in Python. s1: the first string. Problem Solving (Intermediate) Skills Certification Test. where LAT_N is the northern latitude and LONG_W is the western longitude. Efficient solutions to HackerRank JAVA problems. Question 1 – Maximum Passengers. 🚀 - A better way to prepare for Coding InterviewsSolving Leetcode 1456 - Maximum Number of Vowels in a Substring of Given Length, today. Contribute to Aloksingh2004/vowel-substring-hackerrank-certification-solution development by creating an account on GitHub. Hence, Kevin will get 2 Points. The *args is a special syntax in python used to define a variable number of inputs. . Explanation: No such substring is found. Two Pointer Approach: Store the frequencies of each vowel and the indices at which the vowels are present. Output Print the vowel sum Answer for each test case should be printed in a new line. If , we return ' bc '. “b” and “c” are not vowels and i is still less than k, so nothing happens. Problem: summarized version: 1. Case conversion (Lower to Upper and Vice Versa) of a string using BitWise operators in C/C++; Searching For Characters and Substring in a String in Java; Remove consecutive vowels from string; Program to check if the String is Null in JavaNaive Approach: Given a string of length N, the number of substrings that can be formed=N (N+1)/2. . Problem Solving (Basic) Get Certified. md","path":"README. log (res); let res2 = str. My primary purpose is to pass all the platform tests of a given problem. Now, take the first string “aeoi”, it will not be counted because vowel ‘u’ is missing. So the answer should be 'erdii'. But it would fail in many HackerRank test cases. nextInt (); // Close the Scanner to release system resources. # If there are no vowels in the input string, return the string 'Not found!' without quotes. Good luck! This challenge comes from KenKamau at CodeWars, who has licensed redistribution of this challenge under the 2-Clause BSD License!{"payload":{"allShortcutsEnabled":false,"fileTree":{"Problem solving & Exercises/HackerRank/Certificates/Problem Solving (Basic)/usernames-changes":{"items":[{"name. You'll find the String class' substring method helpful in completing this challenge. Time Complexity: O(n^2), (The outer loop runs in O(n) time, and the inner loop runs in O(n) in the worst case (considering all unique characters), resulting in a total time complexity of O(n^2). vowel substring. Python Average Function Hackerrank Solution. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/maximum-cost-of-laptop-count":{"items":[{"name":"test-cases","path. Do you have more questions? Check out our FAQ. That is, 'a', 'e', 'i', 'o', and 'u' must appear an even number of times. The longest common substring is “abcdez” and is of length 6. max (len (list (v)) for k,v in groupby (s, key=lambda x: x in 'aeiou') if k) # 7. player A win. The longest of these has a length of 2. --. py","contentType":"file"},{"name":"README. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/subarray-sums":{"items":[{"name":"test-cases","path":"certificates/problem. Behind the Scenes of the interview processes at Google, Amazon, Microsoft, Facebook, Yahoo, and Apple: Learn what really goes on during your interview day and how decisions get made. A " Wrong Answer " status in your HackerRank Coding questions implies that your program or code is unable to produce the exact expected output for the Test Cases. Scanner input = new Scanner (System. Problem. Active Traders. py","contentType":"file"},{"name":"README. Python Average Function Hackerrank Solution. To get a certificate, two problems have to be solved within 90 minutes. 5 Answers. Take the HackerRank Skills Test. Big Number. {"payload":{"allShortcutsEnabled":false,"fileTree":{"06_SI_Basic-Hackerrank":{"items":[{"name":"01_Max Element in the Array. Efficient approach: Create a prefix array pre[] where pre[i] will store the count vowels in the substring str[0…i]. Navigating this virtual repository of knowledge is a skill in itself, with Vowel Substring Hackerrank Solution readers andChallenge Walkthrough Let's walk through this sample challenge and explore the features of the code editor. . Find Sum of elements in a subarray (if in subarray has 0, sum = sum + number x) input: numbers: main array (1-indexed) queries: array of query: left index, right index, number x (0-indexed)The problem solutions are entirely provided by Deep Dalsania. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. This is a timed test. For example : input "blue" will have number of subsgments = 1, "hackerrank" will return number of segments = 3 ("ha","cker","rank") each will contain at least one consonant and one vowel. simple date time in java. Substring. You have also assigned a rating vi to each problem. We would like to show you a description here but the site won’t allow us. The above mentioned name will be displayed on your certificate and cannot be changed later. Problem Solving (Basic) Skills Certification Test HackerRank Topics nearly-similar-rectangles unexpected-demands vowel-substring nearlysimilarrectangles filledorders findsubstring📞 WhatsApp Group- Server- Join Our Telegram group TechNinjas2. def count_substring (string, sub_string): total = 0 for i in range (len (string)): if string [i:]. We have to complete it such that it returns the average of all the input integers. ; Iterate for all possible lengths from 1 to N: For each length iterate from i = 0 to N-length:. Explore Skills. If you submitted more than one solution for a problem, only your highest score achieved will be used in this calculation. If you have any query then drop me message into LinkedIn or else you can email me on deeppatel. The idea is to traverse the string and keep track of the current number of vowels in the string. I don't know the better solution for it. Output: “aaa”. md","path":"certificates/problem-solving-basic/vowel-substring/README. WHERE name LIKE 'a%a' OR name LIKE 'a%e'. In Java, it can be optimized in two ways: 1. We need a number 0x208222 which gives 1 in its LSB after right-shift 1, 5, 19, 15 otherwise gives 0. You signed in with another tab or window. The problem reduces to finding the number of N-length paths in the constructed directed graph. A map of passenger location has been created,represented as a square matrix. 2 Vowel Substring Hackerrank Solution 2023-08-16 learn these five approaches to tackle the trickiest problems. HackerRank | Practice, Tutorials & Interview Preparation Solutions. Step 4: check the jth character for consonant. For example s=mom, the list of all anagrammatic pairs is [m,m], [mo,om] at positions [ [0], [2]], [ [0,1], [1,2]] respectively. Input: First line contains N , the size of the string. Programs. Take the HackerRank Skills Test. Input: S= “bcbcbc”. of vowels = 2. "ab" is the only possible substring which starts with a vowel (a) and ends with a consonant (b). Maximum number of vowel letters in any substring of string 's' with length 'k' Raw. This tutorial is only for Educational and Learning Purpose. The problem solutions are entirely provided by Deep Dalsania. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"README. So that I did not follow any coding style. Feel free to use my solutions as inspiration, but please don't literally copy the code. Our first time going through our for loop (s[i] = “a”), our second if statement is true: “a” is included in our vowels string. n followed by n integers. gitignore","contentType":"file"},{"name":"Bitwise. Are you legally authorized to work in the United States? Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/vowel-substring":{"items":[{"name":"test-cases","path":"certificates/problem. Query all columns for all American cities in CITY with populations larger than 100000. Python Programming (Basics) Shopping Cart; String Transformation; 2. Question IndexesFunction Description. Participants are ranked by score, with the cumulative time taken (between the contest's start time and the time of your correct. A simple solution is to one by one consider all substrings of the first string. Given a lowercase string that has alphabetic characters only and no spaces, return the length of the longest vowel substring. py","path":"Python/String/The Minion Game/Python2. 0 2: The substrings of aab are a, b, aa, ab, and aab, so we print on a new line. Output: Print "YES" (without the quotes) if all vowels are found in the string, "NO" (without the quotes) otherwise. C Program For Remove All Vowels From A String. August 27, 2023. Please let me know if the certificate problems have changed, so I can put a note here. We use cookies to ensure you have the best browsing experience on our website. 2. Auxiliary Space: O (1)Most efficient way to check Vowel using bit shift : In ASCII these are the respective values of every vowel both in lower and upper cases. casefold () count = {}. Algorithm -: 1. A magical sub-sequence of a string S is a sub-sequence of S that contains all five vowels in order. md","contentType":"file"},{"name":"active-traders","path":"active. Our mission at HackerRankCount the number of vowels and help Apurva. Modified 1 year ago. One more thing to add, don’t straight away look for the solutions, first try to solve the problems by yourself. Print all Substrings of a String that has equal number of vowels and consonants. Polynomials – Hacker Rank Solution. Find the length of largest magical sub-sequence of a string S. {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/road-repair":{"items":[{"name":"test-cases","path":"certificates/problem. Because we only have 1 qualifying substring, "ab" is both the alphabetically first and last qualifying substring and we print it as our first and second lines of output. Input : S = "aba" Output : 2 Substrings of S are : a, ab, aba, b, ba, a Out of these only 'ab' and 'ba' satisfy the condition for special Substring. TOPICS: Introduction. Use the in operator to check if a letter is a vowel. We would like to show you a description here but the site won’t allow us. java","path":"Arrays_2D. let str = "Hello World"; let res = str. Hackerrank Problem Solving(Basic) Certificate test soltions. Query ending with vowels using SQL LOWER () and SUBSTRING () Function. “aaeiouu”. Object Oriented Programming. WHERE name REGEXP '^ [aeiou]. The time complexity is O (n²). Given the string s, return the size of the longest substring containing each vowel an even number of times. Certificate can be viewed here. 1 1: The only substring of a is itself, so we print on a new line. This exercise is to test your understanding of Java Strings. Step 3: If true iterate the string from the end, if false move to next iteration. c. The game ends when both players have made all possible substrings. Input Constraints 1<=T<=10 {"payload":{"allShortcutsEnabled":false,"fileTree":{"certificates/problem-solving-basic/longest-subarray":{"items":[{"name":"test-cases","path":"certificates/problem. Given a string, , and two indices, and , print a substring consisting of all characters in the inclusive range from to . {"payload":{"allShortcutsEnabled":false,"path":"certificates/problem-solving-basic/vowel-substring","repo":{"id":406748388,"defaultBranch":"master","name":"hackerrank. py. Java Substring. start = 0. To get a certificate, two problems have to be solved within 90 minutes. whitney. Linear Algebra – Hacker Rank Solution. For each given string you have to print the total number of vowels. Repeat this process. Join over 16 million developers in solving code challenges on HackerRank, one of the best ways to prepare for programming interviews. Using map[byte]bool to track vowel already seen in substring or not. Auxiliary Space: O(1), no extra space is required, so it is a constant. It covers basic topics of Data Structures (such as Arrays, Strings) and Algorithms (such as Sorting and Searching). The program can be summarized as follows: Count the number of vowels in the substring of length k starting from 0: s [0:k] Check if the count is greater than zero, indicating that the substring contains some vowels. If no vowels and an even number of consonants are present in the string then the player who starts the game loses the game, i.