�只牛时，它不得不慢下来，成为一个群体。求T分钟后一共有几个群体。<span style="font-family: monospace; font-size: 14px; white-space: pre-wrap;"> </span></p>
<p></p></div></div></div></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><span style="font-family: monospace; font-size: 14px; white-space: pre-