ass="special">::</span><span class="identifier">random_device</span> <span class="identifier">rd</span><span class="special">;</span>
  <span class="keyword">unsigned</span> <span class="keyword">int</span> <span class="identifier">seed</span> <span class="special">=</span> <span class="identifier">rd</span><span class="special">();</span>
  <span class="identifier">std</span><span class="special">::</span><span class="identifier">mt19937</span> <span class="identifier">gen</span><span class="special">(</sp