ss="w">      </span><span class="k">DO </span><span class="n">i</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mi">1</span><span class="w"> </span><span class="p">,</span><span class="w"> </span><span class="n">N</span>
<span class="w">            </span><span class="n">ai</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">i</span>
<span class="w">            </span><span class="n">Y1</span><span class="p">(</span><span c