[前台]添加比赛模块里rank,submission页面的列表是空的情况的提示(修改模板)

template/src/oj/problem/problem_list.html

@@ -3,7 +3,7 @@
     {% load problem %}
     <div class="container main">
         <div class="row">
-            <div class="col-lg-9">
+            <div class="col-md-9 col-lg-9">
                 <div class="row">
                     <div class="right">
                         <form class="form-inline" method="get">
@@ -54,7 +54,7 @@
                 </div>
             </div>
 
-            <div class="col-lg-3">
+            <div class="col-md-3 col-lg-3">
                 {% include "oj/announcement/_announcement_panel.html" %}
                 <div class="panel panel-info">
                     <div class="panel-heading">