Longest string without three consecutive characters amazon oa. Given a string s, the task is to calculate its power.

Longest string without three consecutive characters amazon oa Input: str = "abc"; Output: false Explanation: The given string contains a, b, c which are not The empty string is handled without special-case code. For all the substrings of word , find those do not have any substring listed in strs. Given a string, find the length of the longest substring without repeating characters. 03M subscribers Subscribe I’ve done multiple Amazon OA’s and interviews at intern and new grad levels and I’ve never been asked a regex question. During their analysis, they found a category of string they call dominant string: It has an even length. Initialize the re-start index to zero Amazon piethon ricebag Longest Consecutive Sequence Amazon ricebags Amazon- minimum number of rounds to complete task AmazonMax Length of Valid Server Well this will help you to find the commonly asked question in amazon online assessment. We need to make the largest length string containing only ‘a’, ‘b’ and ‘c’ such that no three consecutive characters are sa Amazon OA: The solution works with my system and online compiler but doesn't work on HR Hello, So I had an Amazon OA yesterday. 03M subscribers Subscribe Jul 15, 2025 · Given string str, the task is to check whether the given string contains 3 or more consecutive identical characters/numbers or not by using Regular Expression. Jul 23, 2025 · Given a string str, find the length of the longest substring without repeating characters. Given a string s of length n, determine the number of its distinct substrings that are dominant strings Given [2, 6, 1] return 2 Given [2, 6, 1, 4] return 3 which is sum of the two elements in middle over 2 algorithm Giving a string and an string dictionary, find the longest string in dictionary which can formed by deleting some characters of the giving string. This is a companion discussion topic for the original entry at https://algo. Jan 9, 2022 · Problems 3 196 January 17, 2022 Min Deletions To Obtain String in Right Format - Company-specific OAs / Microsoft OA Problems 0 152 April 10, 2023 String Without 3 Identical Consecutive Letters - Company-specific OAs / Microsoft OA Problems 1 209 November 6, 2021 Split Strings - Company-specific OAs / Google OA Problems 2 178 May 21, 2023 About This Repository contains the java solutions for the Amazon OA Questions. Question: Given a string, find the length of the longest substring without repeating The task is to find the length of the longest substring in a given string that does not contain any repeating characters. Jun 3, 2025 · Here’s an efficient Python solution to the “Longest Substring Without Repeating Characters” problem using the sliding window technique with… Lexicographically Smallest String Longest Substring Without 3 Contiguous Occurrences of Letter String Without 3 Identical Consecutive Letters Min Steps to Make Piles Equal Height Max Inserts to Obtain String Without 3 Consecutive 'a' Concatenated String Length with unique Characters Largest K such that both K and -K exist in array Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. string "df abc k" will return 3. The question was regarding the regex. Longest Substring Without Repeating Characters Table of contents Description Solutions Solution 1: Sliding Window Dec 12, 2024 · To find the length of longest self-sufficient proper substring. One-to-one online classes. In order to do this lets make two counters count and result. Ex: s = 00110101 r = 10101100 Longest prefix of r in s = 10101 [ s = 00 (1)1 (0101), the subsequence bits Jul 20, 2024 · The term "longest substring without repeating characters" refers to finding the longest sequence of characters in a string where no character is repeated. Interview question for Software Engineer (Swe II). String Without 3 Identical Consecutive Letters Microsoft OA Longest Semi-Alternating Substring Microsoft OA Min Steps to Make Piles Equal Height Max Inserts to Obtain String Without 3 Consecutive 'a' Concatenated String Length with unique Characters Check out all the Questions: Click Here Also See: Amazon OA Online Assessment 2023 Questions and Oct 28, 2021 · Topic Replies Views Activity Min Moves to Obtain String Without 3 Identical Consecutive Letters - Company-specific OAs / Microsoft OA Problems 2 167 March 30, 2022 Longest String Without 3 Consecutive Characters Problems 0 194 April 10, 2023 Min Deletions To Obtain String in Right Format - Company-specific OAs / Microsoft OA Problems 0 152 List of Tech Company OAs. io/2020/06/03/Amazon-OA-Questions/ Robin 赏 This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions Max Inserts to Obtain String Without 3 Consecutive 'a' Concatenated String Length with unique Characters Largest K such that both K and -K exist in array Maximum Length of a Concatenated String with Unique Characters Unique Integers That Sum Up To 0 Min Deletions To Obtain String in Right Format Particle Velocity Jump Game Fair Indexes This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions Jul 1, 2020 · Solution: This task is similar to the task String Without 3 Identical Consecutive Letters but here we need to find a longest substring which doesn’t contain three identical consecutive characters and return it’s length. Output the length of remaining string after removal of Dec 12, 2024 · To find the length of longest self-sufficient proper substring. Given a string s of length n, determine the number of its distinct substrings that are dominant strings Apr 8, 2020 · Sometimes, while working with character lists we can have a problem in which we need to perform consecutive repetition of characters. length <= 5 * 10 4 s consists of English letters, digits, symbols, and spaces. All the bits that are not part of the longest prefix of r present in s as a subsequence can be removed and appended to obtain s. Video contains explanation and solution of Amazon Longest Substring With May 11, 2021 · Given string str, the task is to find the length of the longest substring of str such that no three consecutive characters in the substring are same. Whatever the reason, finding the longest consecutive repeated character is a common problem—and Python makes it surprisingly simple to solve. eg:S = abpcplea, Dict = {ale, apple, monkey, plea}, the return "apple" I was thinking Longest Consecutive Sequence - Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. - keineahnung2345/leetcode-cpp-practices Given a string s, find the length of the longest substring without duplicate characters. Your task is to remove atmost two substrings of any length from the given string such that the remaining string contains vowels(\\ Aug 14, 2022 · Problems 3 196 January 17, 2022 Min Deletions To Obtain String in Right Format - Company-specific OAs / Microsoft OA Problems 0 152 April 10, 2023 Longest String Without 3 Consecutive Characters Problems 0 194 April 10, 2023 Split Strings - Company-specific OAs / Google OA Problems 2 178 May 21, 2023 1. The minimum such cost is optimal. eg:S = abpcplea, Dict = {ale, apple, monkey, plea}, the return "apple" I was thinking Dec 24, 2015 · How would I count consecutive characters in Python to see the number of times each unique digit repeats before the next unique digit? At first, I thought I could do something like: word = '1000' c Longest Consecutive Sequence - Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. Note that "bca" and "cab" are also correct answers. I’ve done multiple Amazon OA’s and interviews at intern and new grad levels and I’ve never been asked a regex question. Input: str = "babba" Output: 5 Given string itself is the longest substring. May 16, 2023 · Given a string word and a set of strings strs. Your task is to remove atmost two substrings of any length from the given string such that the remaining string contains vowels('a','e','i','o','u') only. Initially I coded O(n ^ 2 * string len) solutio Amazon OA: The solution works with my system and online compiler but doesn't work on HR Hello, So I had an Amazon OA yesterday. Since the total count can be very large, return the answer modulo 10^9 + 7. Given a string s, the task is to calculate its power. 4 days ago · 最小连接成本问题 - 图论在实际工程中的应用 实用技巧：高效利用题库的方法 制定个性化学习计划 根据自身薄弱环节选择对应题目，比如字符串处理能力不足就重点练习 longest_palindromic_substring 和 longest_string_without_3_consecutive_characters 等题目。 Microsoft Online Assessment (OA) - Max Inserts to Obtain String Without 3 Consecutive 'a' Given a string S, return the maximum number of letters a that can be inserted into S (including at the front and end of S) so that the resulting string doesn’t contain three consecutive letters a. I wrote the reg within a few minutes; however, it didn't work. Aug 26, 2024 · The challenge is to find the length of the longest substring in a given string that does not contain any repeating characters. The questions are listed on Leetcode under &#39;Amazon OA&#39; title, some solutions are gathered from different comments, some of them are my solutions. “string” is a substring of “substring” (source: Wikipedia) ?Examples Let’s have a look at some Can you solve this real interview question? Longest String Chain - You are given an array of words where each word consists of lowercase English letters. A substring (contiguous fragment) of S is called a semi-alternating substring if it does not contain three identical consecutive characters. Apr 23, 2020 · Online Assessment (OA) – 90 MinutesFormat: 3 Coding Problems (Easy to Moderate)Coding Problems: Lexicographically smallest string after k adjacent swaps Find the length of the longest subarray containing all distinct elements Some variant of Kadane’s Hi everyone, I wanted to share my recent Amazon interview experience for SDE-1. Yesterday I got a problem in Amazon OA which had a problem statement which was 1 full page long. Jul 8, 2024 · Problem Statement T his problem is from Leetcode – Longest Substring Without Repeating Characters. Aug 2, 2023 · Round 2 (1 hrs round) : LLD Design Parking lot. Enjoy Can you solve this real interview question? Longest Substring Without Repeating Characters - Given a string s, find the length of the longest substring without duplicate characters. In-depth solution and explanation for LeetCode 3. After clearing the Online Assessment (OA) with all questions completed, I received an interview invite about a week later. May 16, 2023 · I’ve received an online assessment (OA) for an SDE role at Amazon. , checking for "aaaaa" in a password), analyzing text patterns, or solving a coding challenge. A substring is any contiguous sequence of characters within a string. This question's been frequently asked by Amazon, Microsoft, Facebook, Google, Apple, etc Dec 15, 2019 · Longest substring without repeating characters | leetcode | python | leetcode 3 | Amazon thecodingworld 13. Longest Substring Without Repeating Characters using a sliding window approach and an unordered map to track character positions Can you solve this real interview question? Longest Substring Without Repeating Characters - Given a string s, find the length of the longest substring without duplicate characters. Input str: string: A string Oct 13, 2023 · Finally, after processing the entire string, we exit the while loop, and the maxLen variable holds the length of the longest substring without repeating characters. Aug 31, 2019 · Q3:- We are given the maximum occurances of ‘a’, ‘b’ and ‘c’ in a string. In fact, I don’t think I’ve been ever asked a regex question at any company. Most recent interview questions and system design topics gathered from aonecode alumnus. Below is the list of Questions asked in previous Amazon Online Assessment 2023 There is a Amazon regex matching machine that has following requirements: -Regex expressions contains lowercase English letters: ' (' , ')' , ' . Jan 16, 2024 · A C++ solution to LC 3. This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions Microsoft OA Longest Semi-Alternating Substring Microsoft OA Min Steps to Make Piles Equal Height Max Inserts to Obtain String Without 3 Consecutive 'a' Concatenated String Length with unique Characters Check out all the Questions: Click Here Also See: Amazon OA Online Assessment 2023 Questions and Answers Note: Daily updating the list. Let us discuss certain ways in which this task can be performed. In this blog, we Nov 24, 2024 · Finally, after processing the entire string, we exit the while loop, and the maxLen variable holds the length of the longest substring without repeating characters. This can have applications in many domains. Hi everyone, I wanted to share my recent Amazon interview experience for SDE-1. Question: Given a string, find out the length of the longest consecutive substring without repeated characters. You need to partition the string until it is empty in the following way, Select a maximum length substring from the beginning of string S such that it has at most K distinct characters. Given A, B, C, find any string of maximum length that can be created such that no 3 consecutive characters are same. Note: In formal language theory and computer science, a substring is a contiguous sequence of characters within a string. Solution Approach – 1 Initialize a string curStr to empty string. Solutions to Amazon Online Assessment coding tasks from leetcode - cyberbono3/amazon-oa-python Longest Substring Without Repeating Characters is a coding interview question asked in Amazon Interview. regex generator for given strings, given 3 string a,b and c. size ()-1; for (;idx--;idx>=0) { if (a [idx]==c [idx For every ! character, find the cost of assigning all ! characters up to it with 1 and the later ones with 0 (and vice versa). You must write an algorithm that runs in O (n) time. That goes for IBM, Amazon, Palantir, etc. Thanks for any help In Java, finding the longest sequence of consecutive characters in a string involves iterating through the string while maintaining a count of consecutive characters. Constraints: 0 <= s. &nbsp; Example 1: Input: s = &quot;abcabcbb&quot; Output: 3 Explanation: The answer is &quot;abc&quot;, with the length of 3. If they are the same then add one to the length of the current possible longest sequence, if not length is 1 (the length of a new possible longest sequence). There can be at max A 'a', B 'b' and C 'c'. return the longest lexicographically smallest regex matching a and b but not c. s consists of English letters, digits, symbols and spaces. Your task is to return all the subsets of th We would like to show you a description here but the site won’t allow us. - keineahnung2345/leetcode-cpp-practices We would like to show you a description here but the site won’t allow us. This approach enables us to efficiently track the maximum length of identical characters found in the string. You are given an initial parentheses sequence represented by the string s, along with a Parentheses Perfection Kit containing different types of parentheses in the form of the string kitParentheses and their respective efficiency ratings in the efficiencyRatings array (both of size m). Case is ignored for purposes of alphabetization, but case is preserved in the output substring. Two Sum 2. A substring is formed by selecting a starting and ending point without skipping characters in between. ) sample input: azcbobobegghakl sample output: beggh The longest substring that starts at index 0 (and whose characters are in alphabetical order) is 'az', at index 1 is 'z', at index 2 is 'c', at index 3 is 'bo', etc. Contribute to YaokunLin/Algorithms development by creating an account on GitHub. Given a string s, find the length of the longest substring without repeating characters. Apr 5, 2020 · At each iteration you have to remember the preceding parsed character, and then compare with the first of the remaining part of the array. Straightforward String comparison question. The problem statement is as below: Given a string s, find the length of the longest substring without repeating characters. Add Two Numbers 3. If no three are consecutive then output the string as it is. Approach: The following steps can be followed to solve the problem: If the length of You are given with a string . This is different from the standard question, since it considers only consecutive repeating characters. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. All character codes, including chr (0), are properly handled. For example, if the input string is "abcabcbb", the output should be 3, since the longest substring without repeating characters is "abc". Question 2:- You are given an array strings. For instance, in the string “abcabcbb”, the longest substring without repeating characters is “abc”, which has a length of 3. Find the longest substring without repeating any characters. Apr 10, 2023 · Given a string S containing only characters a and b. One of Amazon's most commonly asked coding interview questions according to LeetCode. There can be at max A'a', B'b' and C'c'. For example: String = “aabaabcccbaabaab” Myfunction (String) would return “c” because it is repeated 3 times in a row even though both “a” and “b” are more common. Apr 10, 2023 · Given A, B, C, find any string of maximum length that can be created such that no 3 consecutive characters are same. e. 5 days ago · Have you ever needed to analyze a string to find which character repeats the most consecutively? Maybe you’re validating user input (e. wordA is a predecessor of wordB if and only if we can insert exactly one letter anywhere in wordA without changing the order of the other characters to make it equal to wordB. Consecutive Characters - The power of the string is the maximum length of a non-empty substring that contains only one unique character. Amazon Online Assessment 2026 Amazon OA Questions Get one-to-one training from Google Facebook engineers Top-notch Professionals Learn from Facebook and Google senior engineers interviewed 100+ candidates. The EfficiencyScore of the original strings is initially 0. Return the maximum length Amazon Online Assessment Questions Preparation | Amazon OA Web-Based Evaluation, synonymous with 'Online Assessment' conducted on platforms like Hackerrank or Codility, is an initial protocol that candidates need to pass to secure a Software Development Engineer role at Amazon. 🔠 LeetCode 3: Longest Substring Without Repeating Characters – Python Tutorial (Beginner-Friendly Explanation) This beginner-friendly tutorial breaks down LeetCode 3 using the sliding window We would like to show you a description here but the site won’t allow us. Nov 3, 2020 · Consecutive Characters | LeetCode 1446 | C++, Java, Python Knowledge Center 59. Given a string str, determine the length of the longest substring that does not contain any repeating characters. Some of the test cases didn't pass that regex pattern. Oct 28, 2023 · Given a string, you have to remove the three consecutive duplicates from the string. Nov 13, 2022 · 4 You are given a string S of length N consisting of lowercase English alphabets and an integer K. Given "bbbbb", the answer is "b", with the length of 1. Save your time from finding them all over the internet. Can you solve this real interview question? Longest Substring Without Repeating Characters - Given a string s, find the length of the longest substring without duplicate characters. ' , '*' - left parenthesis, right parenthesis ,dot and asterix. Method #1: Using list comprehension This is one of the way in which this task can be performed. A self-sufficient proper substring is one where 1. Mar 12, 2022 · In this video , Solving Leetcode's Longest Substring Without Repeating Characters problem in Javascript. It is good to have them in one place. This involves identifying the longest substring where the same single character repeats consecutively without any interruption of a different character Feb 22, 2023 · Given string str of lowercase alphabets, the task is to find the length of the longest substring of characters in alphabetical order i. For “ABDEFGABEF”, the longest substring are “BDEFGA” and "DEFGAB", with length 6. Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Note that &quot;bca&quot; and &quot;cab&quot; are also correct answers. Jul 4, 2025 · Tips to Pass the Amazon OA To effectively prepare for and pass the Amazon OA (Online Assessment), focus on practicing coding problems under timed conditions, understanding Amazon’s Leadership Principles, and ensuring your code is clean and efficient. Each character of the string is a lower case alphabetic character. Jun 8, 2021 · ”. Amazon Online Assessment Questions Preparation | Amazon OA Web-Based Evaluation, synonymous with 'Online Assessment' conducted on platforms like Hackerrank or Codility, is an initial protocol that candidates need to pass to secure a Software Development Engineer role at Amazon. “string” is a substring of “substring” (source: Wikipedia) ?Examples Let’s have a look at some . A team of data analysts at Amazon is working to identify data patterns. Lexicographically Smallest String Longest Semi-Alternating Substring Longest Substring Without 3 Contiguous Occurrences of Letter Max Inserts to Obtain String Without 3 Consecutive 'a' Max Network Rank Maximum Length of a Concatenated String with Unique Characters Min Adj Swaps to Make Palindrome Feb 8, 2019 · You are given with a string . The substring is not the entire string s. I can’t find the problem on leetcode or in HackerRank. g. For example, in the string "abcabcbb", the longest substring without repeating characters is "abc", which has a length of 3. I didn’t do the OA for google but had a phone screen instead but I’m sure the OA would have been harder than the phone screen. A subsequence is formed by deleting some (possibly zero) characters from the original string without changing the relative order of the remaining characters. Just had Hiver Interview Process:-Round 1 (DSA):-Question 1:- something related to string manipulation. 1K subscribers Subscribe Longest Substring Without Repeating Characters - Leetcode 3 - Python NeetCode 1. Examples: Input: str = "baaabbabbb" Output: 7 "aabbabb" is the required substring. Could anyone please suggest what type of topics or question patterns I should focus on while preparing? This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions This repositry contains all the Previous year Amazon Online Assessment Tasks - NoobSolver/Amazon-Previous-OA-questions Jun 3, 2020 · Longest string without 3 consecutive characters Longest string made up of only vowels Number of Dice Rolls With Target Sum Find N Unique Integers Sum Up To Zero Number of Dice Rolls with Target Sum Nth GP AMCAT Interface 最后更新： 2020年06月13日 21:11 原始链接： http://roooooobin. I spent 15 minutes just understanding and taking notes and eventually I screwed up and later realized it was a simple sliding window problem but instead I went DP route. Microsoft OA Longest Semi-Alternating Substring Microsoft OA Min Steps to Make Piles Equal Height Max Inserts to Obtain String Without 3 Consecutive 'a' Concatenated String Length with unique Characters Check out all the Questions: Click Here Also See: Amazon OA Online Assessment 2023 Questions and Answers Note: Daily updating the list. Jun 21, 2022 · I was asked two coding questions as part of OA for 90 minutes. Examples: Given "abcabcbb", the answer is "abc", which the length is 3. Apr 29, 2023 · we’re asked to find the length of the longest string of characters in a provided string that does not contain repeating characters. Amazon Online Assessment Questions 2021 OA2 - Longest String Without 3 Consecutive Characters Given A, B, C, find any string of maximum length that can be created such that no 3 consecutive characters are same. For example, if the input string is "abcace", then one possible longest consecutive substring without repeated characters is "abc", which has a length of 3 . Let's take the input string 's' and reverse it and get string 'r' The problem can be reduced to finding the longest prefix of r present as a subsequence in s. About This Repository contains the java solutions for the Amazon OA Questions. github. Dec 22, 2021 · Given a string s, find the length of the longest substring without repeating characters. Including problem statement, solution, runtime and complexity analysis. May 1, 2025 · Learn how to solve LeetCode’s Longest Substring Without Repeating Characters in Java using clean sliding window logic with two simple code examples. Longest Substring Without Repeating Characters in Python, Java, C++ and more. For example, the substrings of string abc are a, b, c, ab, bc, and abc. If there is a tie for the longest alphabetical substring, the function returns the first winning substring it encountered. Given a string s, return the power of s. Amazon Online Assessment (OA) - Longest String Without 3 Consecutive Characters Given A, B, C, find any string of maximum length that can be created such that no 3 consecutive characters are the same. Sep 18, 2023 · (Note that a substring of a string is a sequence of consecutive characters of the string. 1. Delete the selected substring in step-1 from string S. - perixtar/2025-Tech-OA-by-FastPrep Aug 2, 2023 · Explore Amazon's 2023 OA problem on generating the longest string using regex, complete with accepted code and in-depth discussion on LeetCode. In other words, in the string amzzo the longest substring May 19, 2025 · Problem Statement The concept of the power of a string refers to the length of the longest contiguous segment (or substring) within the string that contains exactly one unique character. * For example, "abc" is a predecessor of "abac", while "cba" is Amazon Interview Question - Longest Substring With No Duplicates || Sliding Window Rachit Jain 189K subscribers 65K views 4 years ago Based on a string of undefined length I need to create a function that finds and returns the character which has the longest consecutive repetition. Examples: Input: str = "aaa"; Output: true Explanation: The given string contains a, a, a which are consecutive identical characters. We would like to show you a description here but the site won’t allow us. Better than official and forum solutions. Aug 1, 2022 · 1 I'm starting out on LeetCode, and am currently working on the problem Longest Substring Without Repeating Characters. The string contains at least one character with a frequency that matches exactly half of the length of the string. Longest Substring Without Repeating Characters Given a string, find the length of the longest substring without repeating characters. monster/problems/longest_string_without_3_consecutive_characters/ Feb 22, 2023 · Given string str of lowercase alphabets, the task is to find the length of the longest substring of characters in alphabetical order i. 8K subscribers Subscribed Apr 29, 2015 · In a recent interview, I was asked this to find the length of the longest sub-string with no consecutive repeating characters. Intuitions, example walk through, and complexity analysis. Your aim is the maximise the length of the remaining string. This is where we’ll store the sub-strings as we move forward. if no such regex exits return -1 as a string. Note that there could be multiple such substrings with the same length. In this, we perform a brute force way to perform but in a Given [2, 6, 1] return 2 Given [2, 6, 1, 4] return 3 which is sum of the two elements in middle over 2 algorithm Giving a string and an string dictionary, find the longest string in dictionary which can formed by deleting some characters of the giving string. Aug 2, 2023 · Amazon OA # Code string solve () { string a="AERB",b="ATRC",c="AGCB"; int idx = a. mesbt ouyxgz btodsn sbiz bkky mlbqrq ksxkcca gxdsi xbypu dlbf rgtdow qtigxun qjhslr aaxjbc mlhrkn