s="ui bottom attached segment font-content"><div style="position: relative; overflow: hidden;"><img border="0" src="images/1968.jpg"> </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>只有一行一个整数 N（0 < N < 1000000）。
</div></div></div></div></div><div class="row"><div class="column"><h4 class="ui top