</div><div class="row"><div class="column"><h4 class="ui top attached block header">输入格式</h4><div class="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><div class=content><div style="text-indent: 21pt"><span style="font-size: 10.5pt">第一行包含一个数</span><span style="font-size: 10.5pt">n</span><span style="font-size: 10.5pt">，如题目描述。</span></div>
<div style="text-indent: 21pt"><span style="font-size: 10.5pt">第二行包含</span><