n: relative; 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>3<br />
0 0<br />
2 0<br />
2 1<br />
2<br />
3<br />
4 1<br />
6 5<br />
4 5<br />
3<br />
4 0<br />
6 0<br />
5 -1<br />
</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=conte