Bootstrap - number of columns in the list on the sidebar -


on small size want have 3 columns of list above 'main' div. on bigger size screens need 1 column on left of 'main' div.

it works fine on extra-small size on bigger screens affects 'sidebar div' in way on top of 'main', had class assigned "col-xs-4 col-sm-12". how can change it?

<div class="container">  <div class="row">     <div class="col-sm-2" id="sidebar">         <ul class="row">              <li "col-xs-4 col-sm-12"> 1</li>              <li "col-xs-4 col-sm-12"> 2 </li>              <li "col-xs-4 col-sm-12"> 3</li>              <li "col-xs-4 col-sm-12"> 4</li>              <li "col-xs-4 col-sm-12"> 5</li>         </ul>     <div class="col-sm-10" id="main">   </div> </div>


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