title: Resizing 2D vector in C++ and fill with 0
body: <p>I've got integers n and m and two vectors:</p>
  
  <pre><code>vector&lt; vector&lt;int&gt; &gt; inputGrid;
  vector&lt; vector&lt;int&gt; &gt; outputGrid;
  </code></pre>
  
  <p>How do I resize the 2D vectors to (n, m) and put a 0 in place?</p>
  
  <p>Thanks</p>