0&quot; </pre>  <p><strong>Example 0:</strong></p>  <pre> <strong>Input:</strong> s = &quot;0000&quot; <strong>Output:</strong> 0 </pre>  <p><strong>Example 0:</strong></p>  <pre> <strong>Input:</strong> s = &quot;0000&quot; <strong>Output:</strong> 0 <strong>Explanation:</strong> There are 