Longest k interspace substring amazon oa. Algorithm: linear complexity O(n).

Longest k interspace substring amazon oa Imperative Broccoli, an Amazon engineer, interviewed in Python. This blog explores a classic interview question about finding the longest substring with a limited number of unique characters and how CSOAHelp can guide candidates to excel in every Amazon is developing a string matching library. me/learnwithkrishnasandeepJava Program to find longest substring without repetition| Amazon coding interview questions(For al A team at Amazon working on a product's search algorithm. Input: str = “ababacb”, K = 3 Output: 0 Longest Substring with At Most K Distinct Characters solution: Leetcode 340 (Javascript) Get the length of longest substring with distinct characters in any given input string. It should be possible to modify the algorithm to also count the number of repetitions of the longest non-overlapping substring or to find only solutions with at least k the LRS problem is one that is best solved using either a suffix tree or a suffix array. When we traverse the string, to know the length of current window we need Given a string s and an integer k, return the length of the longest substring of s that contains at most k distinct characters. - perixtar/2025-Tech-OA-by-FastPrep. Method 4 (Linear Time): Let us talk about the linear time solution now. Examples: Input: S = “aabe” Output: 3 Explanation: The substring “aab” can be rearranged to form “aba”, which is a palindromic substring. Input: "bbbbb" Output: 1 The longest substring without repeating characters is b, with length 1. if no such substring exists, return 0. For substring abbb, you have most frequent letter b -> 3 and least frequent letter a -> 1. Input array: [3,1,3,5]One of the Subarrays of Input array: [3,1,3]Max Element: 3Is 3 either the first / last element of the sub-array - YesSo its a valid sub-array [Expected Approach] Using Hash Map and Prefix Sum – O(n) Time and O(n) Space. Longest Substring with At Most K Distinct Characters which is related to Sliding Window. Removi I should be getting back 'blah' as my longest substring, but I haven't figured out a way to accomplish this. We create a set uniqueChars for each substring and store the characters for the substring in the set. The answer is: Longest substring in alphabetical order Given a String and a character K, find longest substring length of K. Find On Episode 11 of Codexplained, we're going to be tackling the coding problem, "Longest Substring Without Repeating Characters". If you want to learn more on data structure, book a session with me on www 131 votes, 138 comments. Join Telegram group : https://t. For example, given s = "abcba" and k = 2, the longest substring with k distinct characters is "bcb". If the string is rrgidenflaaa, Id want to extract rgidenfla. Both approaches have a best time complexity of O(n). Example 1: Input: s = "eceba", k = 2 Output: 3 Explanation: The substring is "ece" with length 3. Input: TrueGeek, K = 3 Output: 6, TrueGe This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions. Use a start pointer and an end pointer to represent a substring in a sliding window, if the current substring has K unique characters or less, it means the string can potentially be longer Level up your coding skills and quickly land a job. Can you solve this real interview question? Longest Substring with At Least K Repeating Characters - Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this substring is greater than or equal to k. I have used Set to keep track of distinct characters. Therefore it is better to greedily bubble all the 1s among the ! assignments to the Given a string s and an int k, return an int representing the number of substrings (not unique) of s with exactly k distinct characters. I have tried to simply the solution. Difficulty: Medium, Asked-in: Microsoft, Amazon, Morgan Stanley. in an input string "aabadefghaabbaagad", the longest such string is "aabbaa" I came up with the following solution but wanted to Find the Longest Substring Having K Distinct Vowels in Java. Below is the implementation of the above approach: Given a string s, you need to print the size of the longest possible substring with exactly k unique characters. For example: Input : "owadcbjkl" Output: "adcb" We consider adcb as contiguous as it The questions are listed on Leetcode under 'Amazon OA' title, some solutions are gathered from different comments, some of them are my solutions. Automate any workflow Packages. Input : test_str = 'abcaacccbbaa', K = c Output : 3 Explanation : Maximum times c occurs is 3. Just go through the array with two pointers i and j and keep track of number K of different letters between S[i] and S[j]. Problem Statement : Given a string s, return the length of the longest palindromic substring. Longest Substring Which Contains 2 Unique Characters. Can you solve this real interview question? Longest Repeating Character Replacement - You are given a string s and an integer k. Decode the Coding Interview in Java: Real-World Examples. Project Description for Amazon Feature Method 4 (Linear Time): Let us talk about the linear time solution now. Sign in Product GitHub Copilot. Input: "abcabcbb" Output: 3 The longest substrings without repeating characters are abc, bca, and cab, all with length 3. Length of longest substring LeetCode Javascript coding solution. Problem Statement : https://practice. com/find-longest-sub-string-length-with-k-distinct-characters/Solution: - We take a Map, which'll give me info about Practice this problem. I know this is a somewhat beaten topic, but I have reached the limit of help I can get from what's already been answered. Given a string, find the longest substring whose characters are contiguous (i. All the bits that are not part of the longest prefix of r present in s as a subsequence can be There used to be a long list of "most asked" Amazon OA questions in the Leetcode discussion forum. Given a binary string S of length N, the task is to find the longest substring consisting of '1's only present in the string after deleting a character from the string. For example, in the string "aabacbebebe" with K = 3, the longest substring is "cbebebe", which has a length of 7. We have explained the process and skills tested in Amazon Online Assessment (OA) and listed the most commonly asked questions (with answers) We need to find the Number of palindromic substrings in a string using Dynamic Programming. Return the length of the longest substring containing the same letter you can get after performing the Longest Substring Without Repeating Characters is a coding interview question asked in Amazon Interview. The idea is to find the sum of string traversed until now. A valid substring must be longer than 1 character. start = 0 result = empty string find max(end): [start, end) is a k-substring LOOP: // please note in every loop iteration, [start, end) Level up your coding skills and quickly land a job. The length of this substring is 3. Given a string S consisting of N lowercase characters, the task is to find the length of the longest substring that does not contain any vowel. Examples: Input : s = “tHeracEBetwEEntheTwo”, k = 1 Output : 14 Explanation : Longest substring with only 1 vowel is “cEBetwEEntheTw” and its length is 14. Examples: Input : s1 = aggayxysdfa s2 = aggajxaaasdfa k = 4 Output : 8 Explanation: aggasdfa is the longest subsequence that can be formed by taking consecutive segments, m Source Code:https://thecodingsimplified. Just implement the function. babababab Master substring separation with our hands-on coding practice for the Amazon OA challenge on AlgoMonster. Integer Replacement; 398. Examples: Input : P = “normal”, Q = “00000000000000000000000000”, K=1 Can you solve this real interview question? Longest Substring with At Least K Repeating Characters - Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this substring is greater than or equal to k. 3. Note: The duplicate substring cannot be the prefix itself Examples: Input: S = "GeeksforGeeks"Output: "forGeeks"Explanation: The longest substring which has a give a string word an integer k find the longest k interspace substring within word. Then, we will find find where the breaks are in input string, i. I felt they were bit too complex. If K is 3, the longest substring can be “aabbcc”. Note: Consider uppercase and lowercase characters as two different characters. Prepare for Amazon’s Online Assessment with this in-depth walkthrough of the “Longest Self-Sufficient Substring” problem. Question: Given a string,find the length of the longe In this video, I'm going to show you how to solve Leetcode 340. Happy Learning!!! The algorithms for finding the longest repeated substring is formulated as follows 1)build the suffix tree 2)find the deepest internal node with at least k leaf children But I cannot understand why is this works,so basically what makes this Level up your coding skills and quickly land a job. For instance, if the string is abcdedddac, Id want to extract abcde. . "I am looking to get the longest substring with the most consecutive and unique characters in Java. Example: Input: String="araaci", K=2 Output: 4 Explanation: The longest substring with no more than '2' distinct characters is "araa". The time complexity of this solution is O(n^2). Given string str containing both uppercase and lowercase letters, and an integer K. Sign in Product Actions. I can follow the code (reproduced below) Given a string s, find the length of the longest substring without repeating characters. If there is no possible substring then print -1. https://leetcode. Given an integer k and a string s, find the length of the longest substring that contains at most k distinct characters. Log In Join for free. The task is to find the longest substring containing exactly K vowels (maybe repetitive). Example 1: Input: s = "aaabb", k = 3 Output: 3 Explanation: The Amazon OA. Example 2. EXAMPLES input: 6, 2 'abbbaa' output: 4 3 //here, 4 is max length and 3 is the position of the first element of substring 'bbaa' in the original string. Examples: Input: str = “aabbba”, K = 3Output: 6Explanation: In substring "aabbba", each character repeats at least k times and its length is 6. Snapchat is known for its algorithm-heavy technical interviews, where candidates must demonstrate their programming skills and effectively communicate their thought process. geeksforgeeks. out of order). Longest possible substring of '1's is 1. This is for the Rosalind project problem LREP. Navigation Menu Toggle navigation. Longest Substring with At Least K Repeating class Solution {public int longestSubstring (String s, int k) You signed in with another tab or window. Back To Course Home. Just return the last K days. The Longest Substring with At Most K Distinct Characters problem asks us to find the length of the longest substring in it with no more than K distinct characters of a given string. (k]-CSS) is a common subsequence of two or more given strings including at most k common substrings. #gfg #POTD #geeksforgeeks In this video, I will be discussing the Problem Longest K unique characters substringHow to Generate Substrings? - https://youtu. In fact, if the number of points per day is fixed then it’s not even a question. Our intuitive platform offers comprehensive practice assessments to prepare you for the real challenge. I can't work out why my attempt d I'm writing regular expression for checking if there is a substring, that contains at least 2 repeats of some pattern next to each other. Given a string, Given a string, print the size of the longest possible substring that has exactly k unique characters. Approach: Using Sliding Window in A simple solution is to one by one consider all the substrings and check if that substring has a count of 1 more than 0. Save your time from finding them all over the internet. Let S be the string. How might I modify my code/logic to get the longest substring that occurs more than once? Thank you. Speedrun Templates Go Pro Special Longest Substring with At Least K Repeating Characters; 396. You can choose any character of the string and change it to any other uppercase English character. Reorder Data in Log Files Solution Amazon OA 2023; Top K Frequent Words Solution Amazon OA 2023; Trees Height Solution Amazon OA SDE 2023; Counting Binary Substrings Amazon OA 2023; Grid Connections Amazon OA 2023; Shipment Imbalance Amazon OA 2023; Max Profit Amazon OA 2023; Your program don't give correct answer when both of the longest common substrings are not prefixes of each input strings. 🏋️ Python / Modern C++ Solutions of All 3298 LeetCode Problems (Weekly Update) - kamyu104/LeetCode-Solutions This is a question regarding question #395 on LeetCode, entitled "Longest Substring with At Least K Repeating Characters. For instance, all substring of abc are [a, b, c, ab, bc, abc]. Since the length of “aab” is 3 so output is 3. 3 Sum Problem: Longest Decreasing Subsequence: Learning python through hackerank / leetcode problems - Extrieve/HackerRank-Python Your Gateway to Success in Online Assessments. Master online tests from leading companies like Amazon, Google, Stripe, and more. If you take a closer look at this problem, this is mainly an extension of Longest Subarray with 0 sum. For each test case, print the length of the longest substring that contains at most K distinct characters. Longest substring repeating at least k times solution. Examples: Input: str = Notation: s = input string, zero-based index [start, end) = substring of input from start to end, including start but excluding end k-substring = a substring that contains at most k different characters. The hash-table is going to act as a search-window. They want to know the length of the longest substring in a product name with its first character lexicographically smaller than its last. In this video I show how to solve similar problems using "Sliding W There is an O(n). Given a string, find the length of t Level up your coding skills and quickly land a job. Integer Break; 344. " Someone posted a remarkably concise solution (in Python), and I am having trouble understanding the idea at the core of this approach. Was it taken down? Please share the link to questions if anyone Given a string str and an integer K, the task is to find the length of the longest substring S such that every character in S appears at least K times. Kindle Direct Publishing, Amazon's e-book self-publishing platform, isworking on a new feature to help authors track the use of text strings in different ways. Examples: Input: S = "1101"Output: 3Explanation: Removing S[0], S modifies to "101". Examples: Input : input = 110101010Output : Length of longest Level up your coding skills and quickly land a job. Given two strings s1, s2 and K, find the length of the longest subsequence formed by consecutive segments of at least length K. Write better code with AI This algorithm doesn't find all possible solutions. And if there is no possible substring print -1, because nothing like a good, sharp negative number to tell you that you’ve ended #amazoninterviewquestionsandanswers #amazonindia #longestsubstringlongest sustring,longest substring without repeating characters,longest substring with at l Find the length of the longest substring with at most K repeating characters and find position of the first element in the substring from the original string. If K is one, then find the longest substring of 0’s in a string using a simple loops; If K is greater than one, then add a given string to the end of the string. The answer would be N(N+1)/2 - (N-K-1)(N-K)/2 I feel like you're not explaining the question correctly. Then string becomes S+S and length will be 2*N and find the longest substring of 0’s in a string using a simple loops If the longest substring is 2*N then, our answer will be K*N. I just received an Amazon OA and am curious what others would rate them on difficulty and topic. The string regex contains exactly one wildcard character(*). The longest qualified substring is 'bc' and the length is 2. You may assume that the maximum length of s is 1000 Contribute to BoRao78/Amazon-OA development by creating an account on GitHub. aabaaabaaaaab. Examples: Input: str = “aabbba”, K = 3 Output: 6 Explanation: In substring “aabbba”, each character repeats at least k times and its length is 6. Objective: Given a string, write an algorithm to find the longest substring with at most K characters. Finding the Length of the Longest Substring without repeating characters. Reverse Vowels of a String; Is it possible to find the longest substring that is at the same time a prefix and a suffix (overlapping is allowed) using only one regular expression? For example: aab is the longest one in aabaaabaaaaab: aabaaabaaaaab. Example 3 One of the Amazon OA Questions from a while ago Solutions Given an array, find the number of sub-arrays that have the maximum element as either the first/last element of the sub-array. The idea is to scan the string from left to right, keep track of the maximum length Non-Repeating Character Substring seen so far in res. com/problems/longest-substring-without-repeating-cha Daily Coding Problem - Problem 13 (Longest Substring with K distinct characters) - Python Sliding Window Solution {Hard: Difficulty, Company: Amazon}LintCode Level up your coding skills and quickly land a job. We will call the ‘check’ function with every substring, and if it returns true, then: Level up your coding skills and quickly land a job. babababab. Input: S = “ceebbaceeffo You keep an array indicating the position at which a certain character occurred last. In fa Level up your coding skills and quickly land a job. A substring is a group of contiguous characters in a string. Random Pick Index; 399. The problem requires a good understanding of the working of Given a string s we have to find the length of the longest substring of s which contain exactly K distinct vowels. So for the input yabyababyab, he'd want to find the substring abyababyab create forwards and backwards rolling hash of the given string look for even and odd palindromes separately for the even case, binary search for the largest k such that there exists a window of length 2 * k where the forwards rolling hash of the first k letters and the backwards rolling hash of the last k letters are equal (this is O(1) with the two rolling hashes- you are just computing 2 We will generate all the substrings using two nested loops and have a ‘check’ function which returns ‘true’ if the number of distinct characters in the substring is less than equal to K, otherwise ‘false’. This question hasn't been solved yet! Not what you’re looking for? Submit your question to I came to the problem of finding the longest substring with k unique characters. Host and manage packages Security. We present a dynamic programming algorithm for finding a longest (k]-CSS of two strings in \(O(kn_1n_2)\) time and space where \(n_1\) and \(n_2\) are the given Length of longest substring: 7 Length of longest substring: -1 Explanation: The longestSubstringKDistinct method uses the sliding window technique with a hashmap to find the longest substring with exactly K distinct characters. This solution uses extra space to store the last indexes of already visited characters. A simple solution would be to generate all substrings of the given string and return the longest substring containing k distinct characters. Let's say we have a string like 00！! based on your approach: - we reach the first ! , so we assign all ! up to it it as 0/1 to get a final string of 00100 or 00001 - we reach the second !, so our final strings are 00110 or 00001 and so on. A wildcard character (*) matches any sequence of zero or more lowercase English characters. Learn the logic, code, and techniqu Given a string P consisting of small English letters and a 26-digit bit string Q, where 1 represents the special character and 0 represents a normal character for the 26 English alphabets. I know that I need to annotate the suffix table with the number of descendant leaves from I tried to have a go at implementing this in O(N), but no able to do so. Enhance your skills today! Start Here. If K is 2, the longest substring can be “aabb”. I found few solutions online like. A subsequence seq is repeated k times in the string s if seq * k is a subsequence Amazon OA. Input: test_str = ‘abcaacccbbaa’, K = c Output: 3 Explanation: Maximum times c occurs is 3. Given a string str and an integer K, the task is to find the length of the longest substring S such that every character in S appears at least K times. The complexity of finding a longest (k]-CSS of 2 strings is still open. Increment j whenever this number is smaller or equal n and increment i Hi I hope you were able to understand the problem solution. You need to look at all the substrings and find the max deviation. 2. Examples: Input: GeeksForGeeks, K = 2 Output: 7, eksForG Explanation: The longest substring having exactly two vowels is “eksForG”. Another example is babab being the longest in babababab: babababab. " You'll need to maintain the maximum length, and the starting index of the sub-string. Here are a few links for you to check out. Remove char to print the longest string in alphabetical order. Take string “aabbccdd” as an example. This is because only number of differences from beginning of Leetcode coding problem 340 (Hard): Longest Substring with At Most K Distinct Characters. Find and fix 30_longest_palindromic_substring. Because if there's some length x such as there are k or more equal substrings in s of length x, then there's definitely k or more equal substrings in s of length x-1 (just remove last letter from our matches). org/ I am trying that age old question (there are multitudes of versions around) of finding the longest substring of a string which doesn't contain repeated characters. When we traverse the string, to know the length of current window we need This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions Given a binary string. Output for every test case will be printed in a separate line. Return the maximum length of such strings. Given a string S of length N, the task is to remove the longest prefix of the string which has at least one duplicate substring present in S. Longest substring with at most K unique characters. You signed out in another tab or window. Find the length of the longest substring of S such that the characters in it can be rearranged to form a palindrome. If there are several non-overlapping longest substrings, only the substring starting at the largest position is found. Example 1, word = 'abcd', strs = ['a','d']. The task is to find the length of the longest substring with at most K normal characters. Given a String and a character K, find longest substring length of K. Method #1: Using loop. they are consecutive letters) but possibly jumbled (i. public static int maxLengthSubstring(String str,int k) { int i=0; int j=i; int max=0; //use set to keep track of distinct characters Set<Integer> set=new TreeSet<>(); char arr[] = str. A (k]-tuple common substring (abbr. n this problem, you can take use of sliding window. First question was basically reversing a linked list to get some information, and the second question was basically a longest contiguous array type of problem with some tweaks. With the help of his friends and trustworthy allies, Jake must fend off waves of dark forces Given a string, find the length of the longest possible substring in it that has exactly K distinct characters. Tim Petters, is in the use of the native str methods and the reusability of the code. readLine(); ArrayList Given a string str and an integer K, the task is to find the length of the longest substring S such that every character in S appears at least K times. I'm unable to find it. You switched accounts on another tab or window. if K is 1, the longest substring can We have a string of length n, which consist only UPPER English alphabet characters and we have a number k (always less than n and greater than 0). For all the substrings of word , find those do not have any substring listed in strs. K consecutive days? That’s not even sliding window then cause the window is fixed in length. Flatten Nested List Iterator; 342. I can think of an O(n*n) algorithm which considers all the substrings of a given string and calculates the number of non-repeating characters. If the count is more than comparing its length with maximum length substring found till now. int ascii = (int) char. toCharArray(); int len = arr. Write a program that prints the longest substring of a given input string s such that the characters of the substring are in alphabetical order. Frequency is like below: c -> 4, a ->1, b->1, d->1. A substring is balanced if it contains an equal number of 0 and 1. Example 2: Given a string, find the longest substring that contains only two unique characters. Example 2, word = The problem involves finding the length of the longest substring in a given string, such that the substring contains at most k distinct characters. Evaluate Division takeuforward is the best place to learn data structures, algorithms, most asked coding interview questions, real interview experiences free of cost. if any charater appeared less than k times, this character cannot be part of substring and it breaks the string into to two substrings, then we repeat this process on two Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this substring is greater than or equal to k. +)(\1). More formally, you are given two strings, a text string text, and a regex expression regex. If no such substring exists, return 0. Example 1: Input: s = "aaabb", k = 3 Output: 3 Explanation: The longest substring is "aaa", as 'a' is repeated 3 times. Additionally, the helper method allUnique utilizes only a few local variables, and its space complexity remains constant regardless of the input size. Example 2: Copy Input: "ccaabbb" Output: 5 Explanation: t is "aabbb" which its length is 5. py. Solutions to Amazon Online Assessment coding tasks from leetcode - cyberbono3/amazon-oa-python. Method #1: Using loop This is brute way to In this approach, we will first capture the characters frequency in input string s into an array of size 26 (each represents lowercase alphabet count). Note: You do not need to print anything, it has already been taken care of. if there are multiple substrings of the longest length, return the one that occurs first in word. Longest Substring with At Most K Distinct Characters. In this approach, we will traverse through all possible substrings and find all the strings with at most K unique characters, and then we will find the maximum size string of all the substrings. Write Get Longest Substrings: Oct, 08, 2024: Amazon: Get Max Alternating Music: Oct, 08, 2024: Amazon: Maximize Secondary Tasks Scheduled: Oct, 08, 2024: Amazon Now, we recommend you practice problem sets based on the concepts of finding the Longest Substring with At Least K Repeating Characters to master your fundamentals. For example, given “abcbbbbcccbdddadacb”, the longest substring that contains 2 unique character is “bcbbbbcccb”. For example, given the following input: abcbdbdsdfng The output should be: 5 Explanation: the first such string is abc (length 3) the next possibility is cbd (length 3) You are given a string s of length n, and an integer k. This is the best place to expand your knowledge and get prepared for your next interview. For example, substringDiff(0, "xa", "ya") returns 0 while 1 is expected. Auxiliary Space: The auxiliary space complexity is O(1) or constant space. Examples: Input: S = “geeksforgeeks”Output: 3The substring "ksf" is the longest substring that does not contain any vowel. The length of this substring is 3 Time Complexity: The time complexity of the provided code is O(n^3), where 'n' is the length of the input string. You can assume that K is less than or equal to the length of the given string. Given a string word and a set of strings strs. So the deviation is = most frequent - least frequent = 3 - 1 = 2. Flowchart. You can get a wide range of questions similar to the problem of finding the Longest Substring with At Least K Repeating Characters on Coding Ninjas Studio. Tried to reason on a couple of examples like 00!!! and 0!0 but got stuck. Power of Four; 343. For example, if we have the string “abcba Which of the assignments is better depends only on whether x > y, not the number of 0s and 1s in the substring. length; while(i<len && j<len){ int # for execution pourposes of the exercise: s = "azcbobobegghakl" print "Longest substring in alphabetical order is: " + anallize( s ) The great piece of this job started by: spacegame and attended by Mr. You are given a string of size n, write a program to find the length of the longest substring without repeating characters. This problem is one of the most commonly asked Amazon interview questions on Leetcode. Rotate Function; 397. Start your journey to career advancement Longest Palindromic Substring - Amazon Top Interview Questions. Skip to content. If there is no possible substring then prin Given a string s and an integer k, return the length of the longest substring of s that contains at most k distinct characters. Reverse String; 345. Space complexity: O(k) since additional space is used only for an ordered dictionary with at most k + 1 elements. I'm trying to find the longest k-peated substring in a string and I've been provided the suffix tree, which is nice. Examples: Input : s = "tHeracEBetwEEntheTwo", k = 1 Output : 14 Explanation : Longest substring with only The “Longest Repeating Character Replacement” problem involves finding the length of the longest substring that contains the same letter after performing at most k replacements. For instance, given the following str=abcbbbddcc, the results should be: k=2 => bcbbb; k=3 => bcbbbddcc; I created a function for this purposes using a hash table. You are to develop a service that finds the longest substring that matches a given regex. Watch interview. Example 1: Copy Input: "eceba" Output: 3 Explanation: t is "ece" which its length is 3. You can perform this operation at most k times. Level up your coding skills and quickly land a job. You are tasked to find the longest subsequence repeated k times in string s. Constraints: 1 <= s. Write better code with AI Security. About interviewing. io. In this example, m is the maximum, and a Shining Beyond an epic adventure featuring our hero Jake, who is furiously fighting a battle against his own personal, very tangible demons. Example: Input: aabbaacdeeeeddded, K = 3 Output: Longest substring with 3 most unique characters is: cdeeeeddded with length 11 Input: abcddefabc, K = 4 Output: Longest substring with 4 most Given a string S consisting of N lowercase characters, the task is to find the length of the longest substring that does not contain any vowel. py","currentUser":null,"blob":{"rawLines":["class Solution:"," \"\"\""," @param s: A I'm working with the algorithmic problem called "Find the longest substring with K unique characters". Key takeaway: An excellent problem to learn problem solving using sliding window approach. I'm matching the result of regex with former he wants to find the longest possible substring that matches the pattern (. Examples: Input: s = "aabacbebebe", k = 3 Output: 7 Explanation: "cbebebe" is t I am looking to find the longest substring without repeating characters and return the length of that substring. Given a string s, find the length of the longest substring t that contains at most 2 distinct characters. Given a string, find the length of the longest substring in it with no more than K distinct characters. Algorithm: linear complexity O(n). Inpu Medium: 430. If no possible substring exists,&nbsp;print -1. Solution: In this video, we introduce how to solve the "Longest Substring Without Repeating Characters" question which is used by big tech companies like Google, Faceb Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Visit the blog Approach: We just need to iterate over all indices and take all possible length sub-strings and then just check whether the sub-string has exactly ‘k’ characters that have ASCII value greater than ‘p’. Here substring cacbcdc has the max deviation. Let’s understand the problem. Efficient way to find longest streak of characters in string. This is brute way to solve this problem, in this, when K is encountered, counter is The task is to find the longest substring in a given string that is composed of any two unique repeating characters Ex. You iterate on the string keeping a window, if a character is repeated in that window, you chop off the prefix that ends with the first occurrence of this character. We need to find the length of the longest balanced substring. We can solve a lot of problems using a similar idea. For convenience all characters occurred at position -1. Typecasting a character to int will give us it’s ASCII value i. We can make at The problem can be reduced to finding the longest prefix of r present as a subsequence in s. We can easily solve this problem in O(n) time and Given a string you need to print the size of the longest possible substring that has exactly K unique characters. An efficient solution is to use hashing. Our primary focus is on the set of vowels because the set of vowels is usually essential to many string manipulation problems, and one such problem is the problem of identifying the longest substring of the given string containing precisely K different vowels. 0. Input : test_str = 'abcaaaacbbaa', K = b Output : 2 Explanation : b occurs twice, 2 > 1. e. b Given a string s, find the length of the longest substring without repeating characters. In this solution, a hashmap is used to track the unique elements in the map. Here is an O(nlog(n)) solution to the LRS problem using a suffix array. Can the following do that or do I need to tweak it somehow? Here’s what I have: for (int i = 0; i < lines; i++) { String s = bf. Below is my method to find the longest substring having k distinct characters. Constraints n ≤ 1,000 where n is the length of s Example 1 Input s = "mactacocatbook" Output 7 Explanation "tacocat" in the middle is the longest palindromic substring. Amazon Online Assessment Questions 2021 (OA) Robot in Circle; Number Game; Find All Combination of Numbers that Sum to a Target; Fill The Truck; Longest Substring with At Most K Distinct Characters; 341. The question might be a mouth I want an algorithm to find the longest substring of characters in a given string containing no repeating characters. The idea is based on the fact that if S j – S i = k (where S i and S j are prefix sums till index i and j respectively, and i < j), then the subarray between i+1 to j has sum equal to k. Elevate your skills, boost your confidence, and ace your next corporate assessment with FastPrep. When the size of uniqueChars is greater than K, then the substring will have more unique Given a string s we have to find the length of the longest substring of s which contain exactly K distinct vowels. Reload to refresh your session. A subsequence is a string that can be derived from another string by deleting some or no characters without changing the order of the remaining characters. Example 1. Reverse Vowels of a String; takeuforward is the best place to learn data structures, algorithms, most asked coding interview questions, real interview experiences free of cost. It seems I am only able to match substrings when they are in ALL items of the list. Example 2: Input: s = "aa", k = 1 Output: 2 Explanation: The substring is "aa" with length 2. The time complexity of this solution is O(n 3) since it takes O(n 2) time to generate all substrings for a string of length n and O(n) time to process each substring. It is good to have them in one Longest Palindromic Substring ''' ''' Given a string s, find the longest palindromic substring in s. ; We will have a ‘longestLength’ variable initialized to 0. Solve the interview question "Longest Substring with At Most K Distinct Characters" in this lesson. In this tutorial, I have explained an efficient approach to find longest substring with at most k distinct characters. g. If the given string doesn't have k distinct characters, return 0. Example 1: Input: s = "aaabb", k = 3 Output: 3 Explanation: The Longest Substring with At Least K Repeating Characters Initializing search walkccc/LeetCode LeetCode Solutions walkccc/LeetCode Home Style Guide 395. Input: test_str = ‘abcaaaacbbaa’, K = b Output: 2 Explanation: b occurs twice, 2 > 1. Let’s say int array is length N. In this approach, we will loop through characters of input string s and capture character and its count into a HashMap and when the HashMap size reached k, keep track of the longest length of substring which had k unique characters, and when the size is going out of bounds of k start removing the characters from left side of the input string. 1. Examples: Input: S = “geeksforgeeks” Output: 3 The substring “ksf” is the longest substring that does not contain any vowel. length In this tutorial, I have explained the problem statement longest substring with k unique characters using sliding window. ezek czq hexg tyjmp nohmc tlnncy jzw xlll ukovh jkld