overflow: hidden;"><h4>样例输入</h4><div class="ui existing segment"><pre style="margin-top:0; margin-bottom:0;"><code class="lang-plain">
			<div class=content><span class=sampledata>4 6<br />
3 2 7 5<br />
2 3<br />
2 4<br />
2 5<br />
2 7<br />
4 6<br />
8 10</span></div></code></pre></div><h4>样例输出</h4><div class="ui existing segment"><pre style="margin-top:0; margin-bottom:0;"><code class="lang-plain">
			<div class=content><span class=sampledata>2<br />
2<br />
3<br />
4<br />
1<