leetcode85. 最大矩形

给定一个仅包含 0 和 1 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。java 示例:code 输入: [   ["1","0","1","0","0"],   ["1","0","1","1","1"],   ["1","1","1","1","1"],   ["1","0","0","1","0"] ] 输出: 6leetcode 和leetcode84没什么区别，就是一行一

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