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Maximal Square

Given an m x n binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area.

Given an m x n binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area.

Maximal Square diagram

Example 1

Input: matrix = [["1","0","1","0","0"],["1","0","1","1","1"],["1","1","1","1","1"],["1","0","0","1","0"]]

Output: 4

Example 2

Input: matrix = [["0","1"],["1","0"]]

Output: 1

Example 3

Input: matrix = [["0"]]

Output: 0

Constraints

  • m == matrix.length
  • n == matrix[i].length
  • 1 <= m, n <= 300
  • matrix[i][j] is '0' or '1'.

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