testant a is able to solve the problem b. Each such pair appears at most once in the input. </span></div>
<div style="line-height: 140%" align="left"><span style="font-size: 14pt; color: #444444; line-height: 140%">In tests worth at least 30% of the points it additionally holds that n,m&lt;=100. </span></div>
<p></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 font-content"><div style="po