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><p>1&lt;=n&lt;=5*10^4</p><br />
<div>1&lt;=m&lt;=5*10^4</div><br />
<div>0&lt;=ai&lt;=10^9</div></p></div></div></div></div></div></div></div><div class="ui vertical footer segment"><div class="ui center aligned container"><span style="color: