w: 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>6<br />
8.0 9.0<br />
4.0 7.5<br />
1.0 2.0<br />
5.1 8.7<br />
9.0 2.0<br />
4.5 1.0<br />
<br />
<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=content><span class=sampledata>5.00<br />
5.0