title: C++ What using for lexicographical_compare?
body: <p>I wan to user the function lexicographical_compare in algorithms library in c++.</p>
  
  <p>But I do not know what to write as far as the using statement. For example</p>
  
  <pre><code>using std::lexicographical_compare ??
  </code></pre>
  
  <p>How can I figure this out for my self in the future?</p>
  
  <p>Thanks</p>