comefrom: <qiyuangong>766_Toeplitz_Matrix_1.java
code: public boolean isToeplitzMatrix(int[][] matrix) {
          for (int r = 1; r < matrix.length; ++r)
              for (int c = 1; c < matrix[0].length; ++c)
                  if (matrix[r-1][c-1] != matrix[r][c])
                      return false;
          return true;
      }
masked: public boolean var_0 ( int [ ] [ ] var_1 ) {
    for ( int var_2 = 1 ;
    var_2 < var_1 . length ;
    ++ var_2 ) for ( int var_3 = 1 ;
    var_3 < var_1 [ 0 ] . length ;
    ++ var_3 ) if ( var_1 [ var_2 - 1 ] [ var_3 - 1 ] != var_1 [ var_2 ] [ var_3 ] ) return false ;
    return true ;
  }
  