o</span> <span class="identifier">sqrt_iterator</span> <span class="special">=</span> <span class="identifier">make_transform_iterator</span><span class="special">(</span><span class="identifier">vec</span><span class="special">.</span><span class="identifier">begin</span><span class="special">(</span><span class="special">)</span><span class="special">,</span> <span class="identifier">sqrt</span><span class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span><span class="s