Longest sequence in array Python – Identify the Longest Consecutive Subsequence in an Array In many data structure and algorithm interviews, you might be asked to find the longest consecutive subsequence in an array. Args: nums (List [int]): A list of integers. So if the input is like [100, 4, 250, 1, 3, 2], answer will be 4, as the longest consecutive sequence is [1,2,3,4]. Jul 12, 2025 · Hence, the answer is 3. Oct 18, 2024 · This C program identifies the longest consecutive sequence of integers within an unsorted array. Example: input => [10,22,9,33,21,50,41,60,80] Example: Output = Jun 4, 2015 · I have a column of zeros and ones 1 0 0 0 1 1 I want to find out the largest sequence of zeros I have in my column AND how many times it appears. I am trying to show than in a random series of integers, it is perfectly possible to Jul 23, 2025 · Given an array arr [] of size n, the task is to find the length of the Longest Increasing Subsequence (LIS) i. The gist of the question is, given an unsorted array of int nums, return the length of the longest consecutive elements sequence in O (n) time. Understanding the Problem Given an array of integers, a consecutive sequence is a sequence of numbers where each consecutive number appear exactly once. Longest Consecutive Sequence - Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Jul 23, 2025 · In this article, we will learn how to find the Longest Increasing Subsequence (LIS) of a given sequence using C programming language. Subsequence doesn’t demand Apr 14, 2010 · I have a set of integers. 2) in decreasing order assign the length of the longest path starting at this cell: 2a) if you cannot reach any of the previously visited cells assign 1 2b Jan 27, 2018 · If I have an array of numbers what I want is to find the location of my longest consecutive numbers for example: my arrary = [ 1999 2000 2001 2003 2004 2005 2006 2007]; I want my output to be = [ 4 5 6 7 8]; because that's the location of my longest consecutive numbers (2003-2007). We first initialize the variable ‘COUNT’ = 0 which stores the length of the consecutive sequence and ‘MX’ = 0 which stores the longest length of consecutive subsequence. In this problem, we'll search for the longest consecutive sequence in the given array. Mar 3, 2024 · For an input array like [1, 94, 93, 1000, 5, 92, 78], the output should be 3, representing the longest consecutive sequence (92, 93, 94). Can you solve this real interview question? Longest Arithmetic Subsequence - Given an array nums of integers, return the length of the longest arithmetic subsequence in nums. Learn more about string, consecutive, function, substring, connected components Image Processing Toolbox Apr 10, 2019 · I would like to get the start and end index of the longest consecutive range of numbers. Apr 3, 2017 · For example, Given [100, 4, 200, 1, 3, 2], The longest consecutive elements sequence is [1, 2, 3, 4]. length - 1). key : function, optional Specifies a function of one argument that is used to extract a comparison key from each list element (e. Why ? Oct 14, 2017 · I assume we are looking for a strictly increasing sequence (this is not clear from the original problem description). Your solution must run in O (n) time complexity. You must write an If the new found array is bigger than the old that means we found a longer sequence and we copy this to p's 1st dynamic array Now we repeat until the entire array has been checked and we return the longest sequence held by p's first array. Mar 13, 2023 · In "Longest Consecutive Sequence" we are given an unsorted array of integers, to find the length of the longest consecutive elements sequence. How to Find Common Elements in Three Sorted Arrays in Java (Hindi) Find The Element That Appears Once In An Array Where Every Other Element Appears Twice in Java Sep 12, 2014 · I have an array like this: 0011011100011111001 I'd like to find the longest sequence of 1's in this array, keeping note of the length and position of the starting point, here the length would be 5 Jul 11, 2025 · Given an array of N integers, find the length of the longest subsequence of a given sequence such that all elements of the subsequence are sorted in strictly decreasing order. In the example, it should be 3 Jul 12, 2023 · We traverse through the array and for every element, we check if it is the starting element of its sequence. In this problem, we're given an unsorted array of integers, and need to find the length of the longest sequence of integers with consecutive values that all appear in the array. You must return the length of the longest successive sequence. LIS is the longest subsequence of a sequence such that all elements of the subsequence are sorted in increasing order. No arrays needed - you only need to compare two numbers (current and last numbers read). . For example, if you have the array [100, 4, 200, 1, 3, 2], the longest consecutive sequence would be [1, 2, 3, 4], which has a length of 4. LeetCode 128: Longest Consecutive Sequence in Python is an array-chasing thrill. In this program, we find the length of the longest increasing subsequence (LIS) in an integer array using Java programming language. It utilizes a hash set (using a simple array) to track elements and count the lengths of consecutive sequences efficiently. Longest Consecutive Sequence - Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. 01M subscribers Subscribe Sep 28, 2020 · The idea is to sort the array, then iterate through the array and find the longest subarray containing consecutive elements. To solve this, we will follow these steps − make the array set, longest := 0 for i in range array − Nov 21, 2013 · I need to find algorithm which will find the longest seqeunce of element in one dimension array. Intuitions, example walk through, and complexity analysis. &nbsp; Example 1: Input: nums = [100,4,200,1,3,2] Output: 4 Explanation: The longest consecutive elements sequence is [1, 2, 3, 4]. In an array, a consecutive sequence is the one where the sequence consists of consecutive integers. Mar 11, 2024 · Method 1: Using Sorting A straightforward method to find the longest consecutive sequence is to sort the array and then iterate through the sorted array to find the longest consecutive elements. subarray). For instance, here's a sample array: [2,5,3,1,1,1,3,7,9,6,4,1,1,1,1,1,4,7,2,3,1,1,4,3] I'd like to write a function that would return "5", since the number 1 occurs 5 times in a row. By iteratively filling in this array, we can find the length of the longest alternating subsequence. Jun 17, 2024 · Step-by-Step Implementation Given the array num = [4, 2, 1, 6, 5], the goal is to find the longest sequence of consecutive elements and maintain their lengths in a dictionary dp. Doing this for n rows results in O (N) operations in total for finding the sequence length for each of the n rows. Formally we look for the longest sequence of indices i 1, … i k such that i 1 <i 2 <⋯ <i k, a [i 1] <a [i 2] <⋯ <a [i k] In this article we discuss multiple algorithms for solving Apr 3, 2017 · For example, Given [100, 4, 200, 1, 3, 2], The longest consecutive elements sequence is [1, 2, 3, 4]. This means identifying the maximum length of a sequence of consecutive integers (regardless of their order in the array). So far, I May 2, 2016 · 6 I am preparing for a coding interview and I have the following questions: Find the biggest positive number sequence in the Integer Array. Here Apr 11, 2023 · Given, a list of Numbers, the task is to print the longest consecutive (Strictly) list, without considering duplicate elements. Dec 4, 2014 · If the current sequence length is greater than the maximum sequence length we've seen, set the max sequence length to the current sequence length. I want to find the longest increasing subsequence of that set using dynamic programming. I have to create a function that will find the longest consecutive sequence of integers in an array. Find the length of the longest sub-sequence such that elements in the subsequence are consecutive integers, the consecutive numbers can be in any order. 8 // Java program to find the longest consecutive sequence in an array // HashSet method import java. Below is my code for the above program: Sep 25, 2023 · The most commonly used approach to solve the Longest Alternating Subsequence problem is through dynamic programming. For instance, for int tab[] = {2, 2, 4, 4, 4, 2, 2, 1, 3}; the answer should be 3 because we Solutions Solution 1: Hash Table We can use a hash table s to store all the elements in the array, a variable ans to record the length of the longest consecutive sequence, and a hash table d to record the length of the consecutive sequence each element x belongs to. Example 1 Input: [12,34,7,4,2,6,8,1,9] Jul 23, 2025 · Minimum Insertions and Deletions Edit Distance Minimum Insertions for Palindrome Longest Common Substring Longest Palindromic Substring Longest Repeated Subsequence Count Distinct Subsequences Regular Expression Matching Related Links: Print LCS of two Strings Dynamic Programming LCS and Edit Distance Dynamic Programming Practice Problems There is an integer array ‘A’ of size ‘N’. Jul 11, 2023 · Learn how to find the Longest Consecutive Sequence in an array, with its implementation of its solution in C++, Java, and Python. If yes, set v, v - 1 and v + 1 to (lowest_v, current_sequence_count) in May 24, 2013 · I have a numpy array like this [1,1,1,-1,-1,1,-1,1,1,-1,-1,-1,1,-1] I'd like to find the length of the longest consecutive series of either 1s or -1s. The In-depth solution and explanation for LeetCode 674. Jun 7, 2018 · Hello everyone, I want to know how to find in a vector the longest sequence of consecutive non-zero values. This problem can then be solved by a dynamic programming approach: 1) sort the cells by their value into decreasing order. Method 1: Sorting and Iterative Checking This method involves sorting the list and then iterating over it to find the longest sequence of consecutive numbers. Jan 11, 2014 · The problem here is to find the length of longest subsequence from the input array such that all the elements are in sorted order. We are given an array that consists of integers we need to find the longest subsequence such that elements in the subsequence are consecutive integers, these numbers are in any order. Example: Given [100, 4, 200, 1, 3, 2 Oct 8, 2023 · Given N elements, write a program that prints the length of the longest increasing consecutive subsequence. Given an array arr [] of non-negative integers. By consecutive range, I mean an integer range of number without skipping, i. Conclusion Finding the longest consecutive sequence in an array is a task that, while seemingly complex, can be simplified significantly with the right approach in kdb+. Oct 14, 2017 · You are given an array of numbers, say nums = [2, 5, 3, 3, 4, 6] And want to get the longest possible sequence of numbers, that are ascending, though not necessarily consequent, while maintaining Jul 25, 2024 · The “Longest Consecutive Sequence” problem is a challenging coding question that tests your understanding of hash sets and efficient searching techniques. You must write an algorithm that runs in O (n) time. com/algorithms/maximum-contiguous-ones-after-one-flip-allowed/Learn how to find the length of the longest contiguous sequenc Solutions Solution 1: Hash Table We can use a hash table s to store all the elements in the array, a variable ans to record the length of the longest consecutive sequence, and a hash table d to record the length of the consecutive sequence each element x belongs to. At the beginning of the game, you start with an empty record. Oct 21, 2023 · Introduction Sequences in arrays often carry tales of patterns, trends, and unique characteristics. This optimal solution runs in linear time. The task is to find the longest, strictly increasing, subsequence in a . For example: Nov 12, 2015 · Finding the longest sequence of increasing numbers in an array Ask Question Asked 9 years, 11 months ago Modified 9 years, 11 months ago Dec 25, 2023 · Problem # Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Jul 15, 2025 · Given an arrayarr [] consisting of N integers, the task is to find the length of the longest subsequence that forms an Arithmetic Progression. One such intriguing question is identifying the longest streak of consecutive numbers. Scanner; import java. Given an unsorted array of integers nums, the objective is to return the length of the longest sequence of consecutive elements. e. example: I have x = [0 1 2 3 0 5 6 7 8 0 10]; I must have as output the block y = [5 6 7 8] Thank you in advance. For example, Input: A = [5, 8, 3, 2, 1, 4], N = 6 Output: 5 Explanation: Oct 15, 2024 · def longest_consecutive (nums): """ Find the length of the longest consecutive elements sequence in an array. Jan 22, 2017 · Longest sequence of a number in an array list Asked 8 years, 1 month ago Modified 8 years, 1 month ago Viewed 724 times May 21, 2024 · I tackled an interesting problem on LeetCode 128: finding the length of the longest consecutive sequence in an unsorted array of integers. Solution # To solve the problem of finding the length of the longest consecutive elements sequence in an unsorted array of integers, we can use a hash set for efficient lookups. For example, Input: A = [5, 8, 3, 2, 1, 4], N = 6 Output: 5 Explanation: Jul 15, 2025 · Given an arrayarr [] consisting of N integers, the task is to find the length of the longest subsequence that forms an Arithmetic Progression. Arrays; import java. This is a Java Program to implement Longest Increasing Subsequence Algorithm. Continue this process for each number in the array, but efficiently skip numbers that clearly aren't the start of a new sequence (as they were part of a previous sequence check). , the longest possible subsequence in which the elements of the subsequence are sorted in increasing order. The main intuition behind solving the problem is to loop through the given array and find whether for each, it’s next Feb 7, 2023 · Given an array containing n numbers. The array is this: {1,2,3,4,4,4,5,7,9,10} Note: repeated numbers in a sequence are skipped. Example: input => [10,22,9,33,21,50,41,60,80] Example: Output = Please watch the new video which covers it in more depth, and also prints it: • Longest Consecutive Sequence | Google more May 26, 2020 · Suppose we have an array of integers. Longest increasing subsequence We are given an array with n numbers: a [0 … n 1] . May 12, 2025 · Java programming exercises and solution: Write a Java program to find the length of the longest consecutive sequence in a given array of integers. More generally, we can say that for a sequence of size n, we can have (2n – 1) non-empty sub-sequences in total. Note: A sequence seq is an arithmetic progression if seq [i + 1] - seq [i] are all the same value (for 0 <= i < seq. Understanding The Problem The Apr 15, 2014 · a [] is my array, c [] should be my final array containing the longest consecutive increasing sequence, cou is a counter that stores the length of the longest sequence of consecutive numbers Longest Consecutive Sequence - Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. Longest Consecutive Sequence: Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. Jul 23, 2025 · The Longest Increasing Subsequence (LIS) problem is to find the length of the longest subsequence of a given sequence such that all elements of the subsequence are sorted in increasing order. Problem statement Given an array of any size, find the length of the longest consecutive sequence, regardless of its order. A consecutive list of numbers are any set Oct 8, 2024 · Introduction A "Longest Consecutive Sequence" refers to a consecutive sequence of numbers within a given set where each number follows the previous one without any gaps. Subsequence doesn’t demand When asked to find the longest sequence of numbers in an array, the normal way would be to sort the array and get the longest set of consecutive numbers. Apr 2, 2025 · I was attempting LeetCode question 128. For instance, for int tab[] = {2, 2, 4, 4, 4, 2, 2, 1, 3}; the answer should be 3 because we Problem- https://tutorialhorizon. If Input is [1,2,5,6,-7,5,7,8,5,6,7,-6,7,0], then output should be [5,7,8,5,6,7], which is the longest positive digit sequence. Whether you’re preparing for coding interviews or honing your problem-solving skills, understanding the problem statement is the first crucial step. Approach: One observation that needs to be made from the array is that the longest subsequence containing only an even number will be the total count of all the even numbers. Nov 9, 2023 · Implement a longestConsecutive function that returns the length of the longest sequence of consecutive numbers in an array Dec 19, 2019 · This applies to finding largest element or longest sequence of consecutive elements too For dealing with subparts of an array, it is not necessary to make an actual copy of the elements, it is enough to store beginning index and ending index or length. Leetcode 128 - LONGEST CONSECUTIVE SEQUENCE NeetCode 1. Nov 13, 2017 · Pseudo code: 1)create two more arrays for longest sequence and another one for running sequence 2)Start looking for matches between 2 original arrays 3)Keep current sequence in runningSequence array 4)check if arrays match 5)if so check if length of running sequence is longer than theLongestSequence array 6)If so, replace the longestSequenceArray content with runningSequence array and keep Given this array int [] myArray = {5,-11,2,3,14,5,-14,2}; I must be able to return 3 because the longest down sequence is 14,5,-14. In this blog post, we’ll explore Jun 23, 2021 · Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. Sep 7, 2015 · How can I use 'find' in matlab to find the longest possible sequence of values that exceed a given threshold. Aug 20, 2025 · Given an array of integers, the task is to find the length of the longest subsequence such that elements in the subsequence are consecutive integers, the consecutive numbers can be in any order. , `str. Examples: Input : arr[] = {1, 2, -3, 2, 3, 4, -6, 1, 2, 3, 4, 5, -8, 5, 6} Output :Index : 7, length : 5 Input Can you solve this real interview question? Longest Increasing Subsequence - Given an integer array nums, return the length of the longest strictly increasing subsequence. Apr 27, 2016 · Longest Sequence of 1s. Want more sequence fun? Try or LeetCode 300: Longest Increasing Subsequence. 1,2,3,4,5 Apr 6, 2016 · Solutions Solution 1: Sorting First, we sort the array, then use a variable [Math Processing Error] t to record the current length of the consecutive sequence, and a variable [Math Processing Error] a n s to record the length of the longest consecutive sequence. Let’s break it down. If yes then by incrementing its value we search the set and increment the length. For example, Given: int number = 5; int [] array = new int [] {5,5,1,1,1,1,5,5,5,1,2}; This should print 3 since 5,5,5 is the longest Your task is to find the length of the longest sequence of consecutive integers that can be formed using the elements from the array. Fro example, if I have: X = [18 3 1 11 8 10 11 3 9 14 6 1 4 3 15 21 23 24]; and want t May 16, 2020 · If we sort the array and then run subarray algorithm, that should also calculate longest subsequence with difference 1, but this approach does not work. These type of problem are quite common while working on some web development projects in Django or flask. The longest increasing subsequence problem is closely related to the longest common subsequence problem, which has a quadratic time dynamic programming solution: the longest increasing subsequence of a sequence is the longest common subsequence of and where is the result of sorting However, for the special case in which the input is a permutation of the integers this approach can be made much Sep 19, 2022 · As direct this problem looks, the trickier it is to solve in O(n) time complexity. Examples: Input : a [] = {3, 10, 3, 11, 4, 5, 6, 7, 8, 12 Introduction This comprehensive tutorial explores the art of finding the longest sequence in Python, providing developers with essential techniques and strategies to efficiently analyze and manipulate sequence data. Sep 17, 2011 · You are given an Array of numbers and they are unsorted/random order. util. Jan 16, 2025 · The Longest Consecutive Sequence problem is a fundamental challenge that tests your ability to identify patterns in unsorted data while maintaining efficiency. This program finds the longest increasing sequence of numbers from an array of numbers. * A sequence seq is arithmetic if seq[i + 1] - seq[i] are By default return the longest increasing subsequence, but it is possible to return the longest decreasing sequence as well. I'm using Python for the matter. Longest Consecutive Sequence - Explanation Problem Link Description You are keeping the scores for a baseball game with strange rules. Example 1: Input: nums = [10,9,2,5,3,7,101,18] Output: 4 Explanation: The longest increasing subsequence is [2,3,7,101], therefore the length is 4. 1st solution: use a map to track numbers v and check if adjacent numbers v - 1 and v + 1 exist. Nov 4, 2021 · I want to find the longest sequence of a given number in an array. Sep 11, 2019 · Finding the longest sequence of "ones" in one row is a simple linear scan which requires O (n) iterations. Given a list of strings operations, where operations[i] is the ith operation you must apply to the record and is one of the following: Jun 5, 2025 · After the loop, compare the length of the current sequence with max_length and update max_length if the current sequence is longer. A sequence is successive when the adjacent elements of the sequence have a difference of 1. The sequence must consist of numbers that appear in the array, and their order in the array is irrelevant. Feb 18, 2016 · I need to find in an array the longest sequence of the same value, and return the length of this sequence. We have to find the length of the longest consecutive elements sequence. The algorithm involves iterating through the array and dynamically checking for consecutive sequences. You must write an algorithm that runs in&nbsp;O (n)&nbsp;time. The longest increasing subsequence is a pr Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. In this topic, we will learn how to find the longest increasing subsequence in an array using dynamic programming. Learn "Longest Consecutive Sequence in JavaScript" with our free interactive tutorial. Next, we start traversing the array from index [Math Processing Error] i = 1. In this video learn how to build a better solution on top of a brute force My assignment is to write a program that finds the longest increasing contiguous subsequence in a given array and prints both the length of that subsequence, and the subsequence it self. Examples Example 1: Input: arr [] = {100, 4, 200, 1, 3, 2} Here is the output of the above example - Length of the longest consecutive sequence: 4 Example-2 Below is another example where we find the length of the longest consecutive sequence for a string input - Jan 31, 2025 · Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. The longest increasing subsequence problem is closely related to the longest common subsequence problem, which has a quadratic time dynamic programming solution: the longest increasing subsequence of a sequence is the longest common subsequence of and where is the result of sorting However, for the special case in which the input is a permutation of the integers this approach can be made much My assignment is to write a program that finds the longest increasing contiguous subsequence in a given array and prints both the length of that subsequence, and the subsequence it self. Given an array X [] of n integers, write a program to find the length of the longest consecutive sequence. The consecutive integers can be in any order. If there is more than one answer, print anyone. Nov 10, 2024 · Understanding the Problem Statement Given an unsorted array of integers, find the length of the longest consecutive elements sequence. Jul 23, 2025 · In this article, we are going to find the longest consecutive sequence of numbers in an array using JavaScript language. Therefore, the following steps are followed to compute the answer: Traverse through the given array element by element. Longest Continuous Increasing Subsequence in Python, Java, C++ and more. For each starting number, iterate through the sequence by checking the presence of… Learn how to find the length of the longest consecutive elements sequence in an unsorted array using a HashSet. Note the sequence need not be in sorted order Learn "Longest Consecutive Sequence in Java" with our free interactive tutorial. Sep 26, 2024 · return 0; } Implementation in Java 1. Whether you're working with lists, arrays, or complex data structures, understanding sequence algorithms is crucial for solving real-world programming challenges. lower`, `lambda x: x[0]`). Better than official and forum solutions. The aim is to find the longest sequence of consecutive numbers within the set. Oct 3, 2025 · Learn how to solve the longest consecutive subsequence problem with O(n) time complexity using HashSets, with code examples in Python, C++, Java and visualization. The algorithm utilizes an array to store the lengths of the longest alternating subsequences up to each index of the input sequence. A subarray is a continuous set of elements of an array, while the subsequence can contain array elements in any order. Oct 6, 2023 · Approach: We need to find longest increasing sequence from the given array. Master this essential concept with step-by-step examples and practice exercises. Nov 22, 2024 · Given an array arr [] of sorted integers and distinct positive integers, find the length of the Longest Arithmetic Progression in it. What's the fastest way to do this? PS: Down sequence is a seri May 16, 2014 · Using JavaScript, I'm trying to find a way to find the longest occurrence of the same number (in this case, 1) in an array. public class Array { public static void main (String args May 11, 2024 · 0 SO I had question regarding the time complexity for my solution for the LeetCode problem "Longest Consecutive Sequence". Oct 28, 2022 · Find the longest-running positive sequence in an array. The "Longest Consecutive Sequence in Array" problem involves finding the longest sequence of consecutive integers in an unsorted array. Apr 10, 2019 · I would like to get the start and end index of the longest consecutive range of numbers. The problem is to find the length of the longest contiguous subarray such that every element in the subarray is strictly greater than its previous element in the same subarray. g. In other words, we need to find the length of the longest subsequence such that the elements in the subsequence are consecutive integers. This challenge can be efficiently solved using algorithms like hash sets or sorting methods to optimize time complexity. Hello, Python (coding in general) newbie, so please forgive me if the question is naive/ I did do a search before asking, but I have not found an answer that fits. HashSet; public class Main { // Function to find the length of longest consecutive subsequence using HashSet public static int longestConsecutive Jul 24, 2025 · A subsequence is a sequence that can be derived from another sequence by removing zero or more elements, without changing the order of the remaining elements. FAANG Python Interview Question: Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence. You are supposed to find the longest sequence of consecutive numbers in the array. (It also occurs 3 and 2 times in a row, but I'm after the longest occurrence). Note that: * A subsequence is an array that can be derived from another array by deleting some or no elements without changing the order of the remaining elements. An increasing subsequence is a sequence of numbers where each number is greater than the previous one. While this method is simple and effective, it has a time complexity of O (n log n) due to the initial sorting step. Jan 15, 2021 · After that, it loops through each sequence, and checks if the length of the sequence is greater than the current longest sequence, which is stored in longestArray. Say the ar Jul 23, 2025 · Minimum Insertions and Deletions Edit Distance Minimum Insertions for Palindrome Longest Common Substring Longest Palindromic Substring Longest Repeated Subsequence Count Distinct Subsequences Regular Expression Matching Related Links: Print LCS of two Strings Dynamic Programming LCS and Edit Distance Dynamic Programming Practice Problems There is an integer array ‘A’ of size ‘N’. The task is to identify the longest consecutive sequence in the array and determine its length. When asked to find the longest sequence of numbers in an array, the normal way would be to sort the array and get the longest set of consecutive numbers. 128. The hash set approach streaks ahead with O (n) speed, while sorting offers a clear alternative. Ready to count? Head to Solve LeetCode 128 on LeetCode and find that longest streak today! Longest Continuous Increasing Subsequence - Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence (i. Note: You can reorder the array to form a sequence. The default value is `None` (compare the elements directly). Say the ar Learn "Longest Consecutive Sequence in Python" with our free interactive tutorial.