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"translatedContent": "<p>给你一个二维整数数组 <code>envelopes</code> ,其中 <code>envelopes[i] = [w<sub>i</sub>, h<sub>i</sub>]</code> ,表示第 <code>i</code> 个信封的宽度和高度。</p>\n\n<p>当另一个信封的宽度和高度都比这个信封大的时候,这个信封就可以放进另一个信封里,如同俄罗斯套娃一样。</p>\n\n<p>请计算 <strong>最多能有多少个</strong> 信封能组成一组“俄罗斯套娃”信封(即可以把一个信封放到另一个信封里面)。</p>\n\n<p><strong>注意</strong>:不允许旋转信封。</p>\n&nbsp;\n\n<p><strong>示例 1</strong></p>\n\n<pre>\n<strong>输入:</strong>envelopes = [[5,4],[6,4],[6,7],[2,3]]\n<strong>输出:</strong>3\n<strong>解释:</strong>最多信封的个数为 <code>3, 组合为: </code>[2,3] =&gt; [5,4] =&gt; [6,7]。</pre>\n\n<p><strong>示例 2</strong></p>\n\n<pre>\n<strong>输入:</strong>envelopes = [[1,1],[1,1],[1,1]]\n<strong>输出:</strong>1\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= envelopes.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>envelopes[i].length == 2</code></li>\n\t<li><code>1 &lt;= w<sub>i</sub>, h<sub>i</sub> &lt;= 10<sup>5</sup></code></li>\n</ul>\n",
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