title: Create a large bitset
body: <p>I need to use a bitset of size 400000000. Just like this:</p>
  
  <pre><code> #include&lt;iostream&gt;
  
   #include&lt;bitset&gt;
  
   using namespace std;
  
   int main(){
   bitset&lt;400000000&gt; coord;}
  </code></pre>
  
  <p>But my program crashes because the bitset is too large. So how can I dynamically allocate a bitset? I can't use boost library.</p>