f="#tests"></a></h2>
</div>
<div class="section level2">
<h2 id="data-structures">Data-structures<a class="anchor" aria-label="anchor" href="#data-structures"></a></h2>
<ul><li>
<p>Suggestion:</p>
<ul><li>if score for (<code>block_a</code>, <code>block_b</code>) is returned, score for (<code>block_b</code>, <code>block_a</code>) should not be returned</li>
</ul></li>
</ul></div>
<div class="section level2">
<h2 id="quicker-implementation">Quicker implementation<a class="anchor" aria-label="anchor" href="#qu