class="special">&lt;</span><span class="keyword">int</span><span class="special">&gt;</span> <span class="identifier">input</span><span class="special">;</span>
    <span class="identifier">input</span> <span class="special">+=</span> <span class="number">1</span><span class="special">,</span><span class="number">2</span><span class="special">,</span><span class="number">3</span><span class="special">,</span><span class="number">4</span><span class="special">,</span><span class="number">5</span><span class=