leetcode 674. Longest Continuous Increasing Subsequence
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1.题目
Given an unsorted array of integers, find the length of longest continuous increasing subsequence.
给一个未排序的整型数组,寻找最长连续递增子序列的长度。
Example 1:
Input: [1,3,5,4,7]
Output: 3
Explanation: The longest continuous increasing subsequence is [1,3,5], its length is 3.
Even though [1,3,5,7] is also an increasing subsequence, it’s not a continuous one where 5 and 7 are separated by 4.
Example 2:
Input: [2,2,2,2,2]
Output: 1
Explanation: The longest continuous increasing subsequence is [2], its length is 1.
Note: Length of the array will not exceed 10,000.
2.分析
遍历一遍数组
用一个计数器count来计算当前递增子序列的长度,maxC保存目前最大的长度。
递增子序列断掉时,判断count是否大于maxC,更新maxC,count重置。
3.代码
int findLengthOfLCIS(vector<int>& nums) { if (nums.size() < 1) return 0; int count = 1; int maxC = 1; for (int i = 1; i < nums.size(); i++) { if (nums[i] > nums[i - 1]) ++count; else { maxC = maxC > count ? maxC : count; count = 1; } } return maxC = maxC > count ? maxC : count; }}
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