sp;&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;elements&nbsp;:&nbsp;t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;elt&nbsp;list<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;min_elt&nbsp;:&nbsp;t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;elt<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;max_elt&nbsp;:&nbsp;t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;elt<br>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">val</