<p>给定一个仅包含&nbsp;<code>0</code> 和 <code>1</code> 、大小为 <code>rows x cols</code> 的二维二进制矩阵,找出只包含 <code>1</code> 的最大矩形,并返回其面积。</p>

<p>&nbsp;</p>

<p><strong>示例 1:</strong></p>
<img alt="" src="https://assets.leetcode.com/uploads/2020/09/14/maximal.jpg" style="width: 402px; height: 322px;" />
<pre>
<strong>输入:</strong>matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]]
<strong>输出:</strong>6
<strong>解释:</strong>最大矩形如上图所示。
</pre>

<p><strong>示例 2:</strong></p>

<pre>
<strong>输入:</strong>matrix = [["0"]]
<strong>输出:</strong>0
</pre>

<p><strong>示例 3:</strong></p>

<pre>
<strong>输入:</strong>matrix = [["1"]]
<strong>输出:</strong>1
</pre>

<p>&nbsp;</p>

<p><strong>提示:</strong></p>

<ul>
	<li><code>rows == matrix.length</code></li>
	<li><code>cols == matrix[0].length</code></li>
	<li><code>1 &lt;= row, cols &lt;= 200</code></li>
	<li><code>matrix[i][j]</code> 为 <code>'0'</code> 或 <code>'1'</code></li>
</ul>