ont-content"><div style="position: relative; overflow: hidden;"><div class=content><p>The first line of input contains the value of N (2&le;N&le;50,000).<br />
<br />
The  next N lines contain the cards that Elsie will play in each of the  successive rounds of the game. Note that it is easy to determine  Bessie's cards from this information.</p></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