comefrom: <qiyuangong>221_Maximal_Square_1.py
code: def maximalSquare( matrix):
      if matrix is None or len(matrix) == 0:
          return 0
      rows, cols = len(matrix), len(matrix[0])
      res = 0
      for i in range(rows):
          for j in range(cols):
              if matrix[i][j] == '1':
                  sqlen, flag = 1, True
                  while sqlen + i < rows and sqlen + j < cols and flag:
                      for k in range(j, sqlen + j + 1):
                          if matrix[i + sqlen][k] == '0':
                              flag = False
                              break
                      for k in range(i, sqlen + i + 1):
                          if matrix[k][j + sqlen] == '0':
                              flag = False
                              break
                      if flag:
                          sqlen += 1
                  if res < sqlen:
                      res = sqlen
      return res * res
masked: def sample_funcname ( var_0 ) :
      if var_0 is None or len ( var_0 ) == 0 :
          return 0
      var_4 , var_5 = len ( var_0 ) , len ( var_0 [ 0 ] )
      var_6 = 0
      for var_8 in range ( var_4 ) :
          for var_9 in range ( var_5 ) :
              if var_0 [ var_8 ] [ var_9 ] == '1' :
                  var_12 , var_14 = 1 , True
                  while var_12 + var_8 < var_4 and var_12 + var_9 < var_5 and var_14 :
                      for var_15 in range ( var_9 , var_12 + var_9 + 1 ) :
                          if var_0 [ var_8 + var_12 ] [ var_15 ] == '0' :
                              var_14 = False
                              break
                      for var_15 in range ( var_8 , var_12 + var_8 + 1 ) :
                          if var_0 [ var_15 ] [ var_9 + var_12 ] == '0' :
                              var_14 = False
                              break
                      if var_14 :
                          var_12 += 1
                  if var_6 < var_12 :
                      var_6 = var_12
      return var_6 * var_6
  