Share my concise python solution


  • 10
    class Solution:
    # @param {character[][]} matrix
    # @return {integer}
    def maximalSquare(self, matrix):
        if not matrix: return 0
        m , n = len(matrix),len(matrix[0])
        dp = [[0 if matrix[i][j]=='0' else 1for j in xrange(n)]for i in xrange(m)]
        
        for i in xrange(1,m):
            for j in xrange(1,n):
                if matrix[i][j] =='1': dp[i][j] = min(dp[i-1][j],dp[i][j-1],dp[i-1][j-1])+1
                else: dp[i][j] = 0
        
        ans = max([max(i) for i in dp])
        return ans ** 2

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