Longest substring with k unique characters. Example 3: Input: s .

Longest substring with k unique characters org Aug 30, 2021 · Learn how to solve this problem using a sliding window technique in C++, Java, and Python. Algorithm: Set ans as 0; Iterate i from 0 to the length of str - 1. Source Code:https://thecodingsimplified. Example 3: Input: s Dec 4, 2020 · Some possible good substrings are: 1. While the dict object keys are less than K distinct characters, Feb 10, 2013 · For example, given “abcbbbbcccbdddadacb”, the longest substring that contains 2 unique character is “bcbbbbcccb”. First Unique Character in a String; 388. If there are multiple longest substrings, then return the first substring encountered with the longest length. Longest Substring Which Contains 2 Unique Characters. The second line of each test case contains a string ‘S’ Output Format: For each test case, print a single line containing an integer denoting the length of the longest substring that contains at most 'K' distinct characters. If no possible substring exists, print -1. 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. If there is no possible substring then print -1. If K is 3, the longest substring can be “aabbcc”. 1. if no such substring exists, return 0. Apr 24, 2023 · Learn how to find the longest substring with exactly k unique characters in a given string using various methods and languages. When the size of uniqueChars is greater than K, then the substring will have more unique characters than K. Examples: Input: s = "aabacbebebe", k = 3 Output: 7 Explanation: "cbebebe" is t May 16, 2023 · Input: String="araaci", K=2 Output: 4 Explanation: The longest substring with no more than '2' distinct characters is "araa". IMO you can do this in O(N*k) time and O(k) extra space (where k = number of unique characters allowed): Iterate the string from the beginning and add the 1st character in a map of value to last position found. Example 1: Input: s = "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. For the above input, it should be "deeeeggi". See examples, explanations, code and complexity analysis. Here is an elegant O(n) solution for the problem in Python. cc/AVBAT[FREE] Begi 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 unique characters is: abcdd with length 5 Input: aaaabbbb, K = 4 Output: Not enough unique character is present in the input string Approach: Brute Force The first line of each test case contains a single integer ‘K’, denoting the maximum number of distinct characters. Examples: Input: S = "abcd1111aabc", K = '1' Output: 4 Explanation: 1111 is the largest substring of length 4. Initialise an empty set uniqueChars; Iterate j from i to the length Mar 10, 2024 · As we iterate through the string, we adjust the pointers to ensure the window always contains at most k distinct characters, and we record the length whenever we find a longer valid substring. but I am not getting the desired output for all the inputs. com/find-longest-sub-string-length-with-k-distinct-characters/Solution: - We take a Map, which'll give me info about Mar 31, 2020 · Given a string, find the length of the longest substring in it with no more than K distinct characters. Here’s an example: def longest_substring_k_unique(s, k): start = 0 max_length = 0 char_index_map = {} for end in range(len(s)): char_index_map[s[end Given a string, find the length of the longest possible substring in it that has exactly K distinct characters. I am implementing in Java. Given a string s, you need to print the size of the longest possible substring with exactly k unique characters. The task is to find the length of the longest substring of S having all characters the same as character K. n this problem, you can take use of sliding window. “acd” 3. 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. When a third character is added to the map, the left pointer needs to move right. Examples: Input: s = "aabacbebebe", k = 3 Output: 7 Explanation: "cbebebe" is t Apr 25, 2023 · Given a string str and an integer K, the task is to print the length of the longest possible substring that has exactly K unique characters. Longest Absolute File Path; 389. k will range from 1 to 6. Given a string, find the length of t but your program should return "aabba" because it is the longest substring. Apr 6, 2024 · Given a string S and a character K. The hash-table is going to act as a search-window. “acda” The substring “acda” is the largest possible good substring, as we cannot get any other substring of length 5 or more having distinct characters less than or equal to ‘3’. Rotate 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. Prepare for DSA interview rounds at the top companies. Learn best approach and practices to solve longest substring with k unique characters interview question. 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. If no such substring exists, return 0. Apr 3, 2018 · If K is 2, the longest substring can be “aabb”. Function Signature:. Input: S = "#1234#@@abcd", K = '@' Output: 2 Apr 14, 2019 · I came to the problem of finding the longest substring with k unique characters. Examples: Input: str = “aabacbebebe”, K = 3 Output: 7 The existing answers don't work correctly, since they only search for longest unique substrings starting at specific positions (the start of the string and immediately after some duplicate characters). Find the Difference Longest Substring with At Least K Repeating Characters; 396. “bac” 2. The algorithm runs in O (n) time and O (n) space and returns the longest substring containing k distinct characters. Your present code complexity is O(N^2) since you are using nested for loops to check for substrings that start from each character. Learn how to find the longest substring with exactly k unique characters in a given string. Example 1: Input: s = "aaabb", k = 3 Output: 3 Explanation: The longest See full list on geeksforgeeks. Example 1: Input: s = "aaabb", k = 3 Output: 3 Explanation: The longest substring Can you solve this real interview question? Longest Substring with At Most K Distinct Characters - Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. See examples, constraints, and solutions for this medium-level problem. Example: Input: String="araaci", K=2 Output: 4 Explanation: The longest substring with no more than '2' distinct characters is "araa". Example 2: Input: s = "bbbbb" Output: 1 Explanation: The answer is "b", with the length of 1. Aug 29, 2021 · We create a set uniqueChars for each substring and store the characters for the substring in the set. If there is more than one substring of the longest possible length, then print any one of them or print -1 if there is no such substring possible. Apr 21, 2016 · Given a String, ""aabbcdeeeeggi" and k=3, the code should find longest substring with maximum of k unique characters. Examples: Input: s = "aabacbebebe", k = 3 Output: 7 Explanation: "cbebebe" is t Sep 23, 2024 · Write a Python function that finds the longest substring of a given string that contains exactly K unique characters. Can you solve this real interview question? Longest Substring Without Repeating Characters - Given a string s, find the length of the longest substring without repeating characters. Dec 20, 2020 · Become a Competitive Programming Hero with this structured batch to help all levels of programmers sharpen their skills: http://unacademy. You can assume that K is less than or equal to the length of the given string. In this solution, a hashmap is used to track the unique elements in the map. 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 Jun 24, 2022 · In this tutorial, I have explained the problem statement longest substring with k unique characters using sliding window. ayffp xswu rncb ivq czlgnpw rjcav jijbjma cvvnzan djg swvdz