/a>  <span class="dt">vector</span>[N] x;</span>
<span id="cb4-4"><a href="#cb4-4" aria-hidden="true" tabindex="-1"></a>  <span class="dt">vector</span>[N] y;</span>
<span id="cb4-5"><a href="#cb4-5" aria-hidden="true" tabindex="-1"></a>  <span class="dt">int</span>&lt;<span class="kw">lower</span>=<span class="dv">0</span>, <span class="kw">upper</span>=N&gt; N_test;</span>
<span id="cb4-6"><a href="#cb4-6" aria-hidden="true" tabindex="-1"></a>}</span>
<span id="cb4-7"><a href="#cb4-7" aria-hidden="true" t