674. Longest Continuous Increasing Subsequence
2021/7/13 6:05:52
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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
class Solution { public int findLengthOfLCIS(int[] nums) { int cur = 1, res = 1; for(int r = 1; r < nums.length; r++) { if(nums[r] > nums[r - 1]) { cur++; res = Math.max(res, cur); } else cur = 1; } return res; } }
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