Problem0221

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221. Maximal Square

题目

Given a 2D binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area.

For example, given the following matrix:

1 0 1 0 0
1 0 1 1 1
1 1 1 1 1
1 0 0 1 0

Return 4.

Credits:Special thanks to @Freezen for adding this problem and creating all test cases.

解题思路

[解题报告] LeetCode 221. Maximal Square