/span>
<span class="cp">#include</span> <span class="cpf">&lt;cassert&gt;</span><span class="cp"></span>

<span class="k">struct</span> <span class="n">max_f</span>
<span class="p">{</span>
    <span class="k">template</span><span class="o">&lt;</span><span class="k">class</span> <span class="nc">T</span><span class="p">,</span> <span class="k">class</span> <span class="nc">U</span><span class="o">&gt;</span>
    <span class="k">constexpr</span> <span class="n">T</span> <span class="k">operator</span><span 