<h4 class="ui top attached block header">输出格式</h4><div class="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><div class=content><div><span style="font-size: 14pt">&nbsp;&nbsp; </span><span style="font-size: 14pt">仅一行，为所需最短时间。若无法到达</span><span style="font-size: 14pt">t</span><span style="font-size: 14pt">号点，则输出</span><span style="font-size: 14pt">0.</span></div></div></div></div></div></div><div class="row"><di