<p>In <a href="https://github.com/mlpack/mlpack/pull/691#discussion_r68639241">src/mlpack/methods/lsh/lsh_search_impl.hpp</a>:</p>
<pre style='color:#555'>&gt; +}
&gt; +
&gt; +// Inline function used by GetAdditionalProbingBins. The vector shift operation
&gt; +// replaces the largest element of a vector A with (largest element) + 1.
&gt; +inline void perturbationShift(std::vector&lt;size_t&gt; &amp;A)
&gt; +{
&gt; +  size_t max_pos = 0;
&gt; +  size_t max = A[0];
&gt; +  for (size_t i = 1; i &lt; A.size(); ++i)
&gt; +  {
&gt; +    if (A[i] &gt; max)
&gt; +    {
&gt; +      max = A[i];
&gt; +      max_pos = i;
&gt; +    }
&gt; +  }
</pre>
<p>I'd just pick <code>std::vector&lt;bool&gt;</code>, since that will pack things the same way <code>bitset</code> would, but does not have the same compile-time length requirement.</p>

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