"literallayout"><span class="keyword">explicit</span> <a name="idp82666560-bb"></a><span class="identifier">negative_binomial_distribution</span><span class="special">(</span><span class="identifier">IntType</span> k <span class="special">=</span> <span class="number">1</span><span class="special">,</span> <span class="identifier">RealType</span> p <span class="special">=</span> <span class="number">0</span><span class="special">.</span><span class="number">5</span><span class="special">)</span><span class=