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221. Maximal Square

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Description

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

Example:

Input: 



1 0 1 0 0

1 0 1 1 1

1 1 1 1 1

1 0 0 1 0



Output: 4

Solutions

Python3

Java

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