=content><div style="margin: 0cm 0cm 12pt" align="left"><span style="font-size: medium">The first line of the input file contains an integer <i>n</i>,1&lt;=N&lt;=100 000.<br />
<br />
The next <i>n</i> lines contain two integers each, the coordinates of the given points. The coordinates don't exceed 10<sup>9</sup> by absolute value.</span></div></div></div></div></div></div><div class="row"><div class="column"><h4 class="ui top attached block header">输出格式</h4><div class="ui bottom attached segment