mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-11-04 11:43:12 +08:00
38 lines
1.2 KiB
HTML
38 lines
1.2 KiB
HTML
<p>Given an integer array <code>nums</code>, return the length of the longest strictly increasing subsequence.</p>
|
|
|
|
<p>A <strong>subsequence</strong> is a sequence that can be derived from an array by deleting some or no elements without changing the order of the remaining elements. For example, <code>[3,6,2,7]</code> is a subsequence of the array <code>[0,3,1,6,2,2,7]</code>.</p>
|
|
|
|
<p> </p>
|
|
<p><strong>Example 1:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> nums = [10,9,2,5,3,7,101,18]
|
|
<strong>Output:</strong> 4
|
|
<strong>Explanation:</strong> The longest increasing subsequence is [2,3,7,101], therefore the length is 4.
|
|
</pre>
|
|
|
|
<p><strong>Example 2:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> nums = [0,1,0,3,2,3]
|
|
<strong>Output:</strong> 4
|
|
</pre>
|
|
|
|
<p><strong>Example 3:</strong></p>
|
|
|
|
<pre>
|
|
<strong>Input:</strong> nums = [7,7,7,7,7,7,7]
|
|
<strong>Output:</strong> 1
|
|
</pre>
|
|
|
|
<p> </p>
|
|
<p><strong>Constraints:</strong></p>
|
|
|
|
<ul>
|
|
<li><code>1 <= nums.length <= 2500</code></li>
|
|
<li><code>-10<sup>4</sup> <= nums[i] <= 10<sup>4</sup></code></li>
|
|
</ul>
|
|
|
|
<p> </p>
|
|
<p><b>Follow up:</b> Can you come up with an algorithm that runs in <code>O(n log(n))</code> time complexity?</p>
|