ation of an interval_map that maps intervals to integers. An interval_map&lt;int,int&gt;
        serves as an overlap counter if we only add interval value pairs that carry
        1 as associated value.
      </p>
<p>
        Doing so, the associated values that are accumulated in the interval_map
        are just the number of overlaps of all added intervals.
      </p>
<p>
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special">&lt;</span><span class="identifier"