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leetcode-problemset/leetcode-cn/problem (Chinese)/最长递增子序列的个数 [number-of-longest-increasing-subsequence].html
2022-03-29 12:43:11 +08:00

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<p>给定一个未排序的整数数组<meta charset="UTF-8" />&nbsp;<code>nums</code>&nbsp;&nbsp;<em>返回最长递增子序列的个数</em>&nbsp;</p>
<p><strong>注意</strong>&nbsp;这个数列必须是 <strong>严格</strong> 递增的。</p>
<p>&nbsp;</p>
<p><strong>示例 1:</strong></p>
<pre>
<strong>输入:</strong> [1,3,5,4,7]
<strong>输出:</strong> 2
<strong>解释:</strong> 有两个最长递增子序列,分别是 [1, 3, 4, 7] 和[1, 3, 5, 7]。
</pre>
<p><strong>示例 2:</strong></p>
<pre>
<strong>输入:</strong> [2,2,2,2,2]
<strong>输出:</strong> 5
<strong>解释:</strong> 最长递增子序列的长度是1并且存在5个子序列的长度为1因此输出5。
</pre>
<p>&nbsp;</p>
<p><strong>提示:</strong>&nbsp;</p>
<p><meta charset="UTF-8" /></p>
<ul>
<li><code>1 &lt;= nums.length &lt;= 2000</code></li>
<li><code>-10<sup>6</sup>&nbsp;&lt;= nums[i] &lt;= 10<sup>6</sup></code></li>
</ul>