力扣85. 最大矩形

力扣85. Maximal Rectangle（最大矩形）

给定一个仅包含 0 和 1、大小为 rows×cols 的二维二进制矩阵，找出只包含 1 的最大矩形，并返回其面积。

示例 1：

输入：matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]]
输出：6

示例 2：

输入：matrix = [["0"]]
输出：0

提示：

• rows == matrix.length
• cols == matrix[0].length
• 1 <= rows, cols <= 200