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Java-based LeetCode algorithm problem solutions, regularly updated
674\. Longest Continuous Increasing Subsequence
Easy
Given an unsorted array of integers `nums`, return _the length of the longest **continuous increasing subsequence** (i.e. subarray)_. The subsequence must be **strictly** increasing.
A **continuous increasing subsequence** is defined by two indices `l` and `r` (`l < r`) such that it is `[nums[l], nums[l + 1], ..., nums[r - 1], nums[r]]` and for each `l <= i < r`, `nums[i] < nums[i + 1]`.
**Example 1:**
**Input:** nums = [1,3,5,4,7]
**Output:** 3
**Explanation:** The longest continuous increasing subsequence is [1,3,5] with length 3. Even though [1,3,5,7] is an increasing subsequence, it is not continuous as elements 5 and 7 are separated by element 4.
**Example 2:**
**Input:** nums = [2,2,2,2,2]
**Output:** 1
**Explanation:** The longest continuous increasing subsequence is [2] with length 1. Note that it must be strictly increasing.
**Constraints:**
* 1 <= nums.length <= 104
* -109 <= nums[i] <= 109