t-size: 12pt">1</span><span style="font-size: 12pt">，第二个读入的港口编号为</span><span style="font-size: 12pt">2</span><span style="font-size: 12pt">&hellip;&hellip;</span></div>
<div style="line-height: 20pt"><span style="font-size: 12pt">&nbsp;&nbsp;&nbsp; </span><span style="font-size: 12pt">第</span><span style="font-size: 12pt">N+2</span><span style="font-size: 12pt">行到第</span><span style="font-size: 12pt">N+port_num+1</span><span style="font-size: 12pt">行按编号顺序给出�