class="lang-plain">
			<div class=content><span class=sampledata>3<br />
5</span></div></code></pre></div></div></div></div></div><div class="row"><div class="column"><h4 class="ui top attached block header">数据范围与提示</h4><div class="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;">
			<div class=content><p><div>数据规模和约定</div><br />
<div>1&lt;=N&lt;=500000,操作数不超过200000个，内存限制20M，保证答案在int范围内并且�