leetcode85. 最大矩形

給定一個僅包含 0 和 1 的二維二進制矩陣，找出只包含 1 的最大矩形，並返回其面積。java 示例:code 輸入: [   ["1","0","1","0","0"],   ["1","0","1","1","1"],   ["1","1","1","1","1"],   ["1","0","0","1","0"] ] 輸出: 6leetcode 和leetcode84沒什麼區別，就是一行一

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