title: Non Linear Integer Programming
body: <p>I would like to know if there is a package in R handling non linear integer optimization.</p>
  
  <p>"Basically", I would like to solve the following problem:</p>
  
  <p><code>max f(x) s.t x in (0,10) and x is integer</code>.</p>
  
  <p>I know that some branching algorithms are able to handle the linear version of this problem, but here my function <code>f()</code> might be more complicated. (I can't even make sure it would be quadratic of the form <code>f(x)=xQx</code>).</p>
  
  <p>I guess there is always the brute force solution to test all the possibilities as long as they are bounded, but I was wondering if there wasn't anything smarter.   </p>