public static void main ( String args [ ] ) throws Exception {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int C = sc . nextInt ( ) ;
  int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ;
  int [ ] [ ] c = new int [ N + 1 ] [ N + 1 ] ;
  int [ ] [ ] table = new int [ 3 ] [ C + 1 ] ;
  for ( int i = 1 ;
  i <= C ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) {
      D [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    for ( int j = 1 ;
    j <= N ;
    j ++ ) {
      int col = sc . nextInt ( ) ;
      table [ ( i + j ) % 3 ] [ col ] ++ ;
    }
  }
  int [ ] [ ] costable = new int [ 3 ] [ C + 1 ] ;
  for ( int i = 0 ;
  i < 3 ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) for ( int k = 1 ;
    k <= C ;
    k ++ ) {
      costable [ i ] [ k ] += D [ j ] [ k ] * table [ i ] [ j ] ;
    }
  }
  int min = 260000000 ;
  for ( int i = 1 ;
  i <= C ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) {
      for ( int k = 1 ;
      k <= C ;
      k ++ ) {
        if ( i != j && j != k && k != i ) {
          min = Math . min ( min , costable [ 0 ] [ i ] + costable [ 1 ] [ j ] + costable [ 2 ] [ k ] ) ;
        }
      }
    }
  }
  System . out . println ( min ) ;
}

public static void main ( String args [ ] ) throws Exception { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; int C = sc . nextInt ( ) ; int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ; int [ ] [ ] c = new int [ N + 1 ] [ N + 1 ] ; int [ ] [ ] table = new int [ 3 ] [ C + 1 ] ; for ( int i = 1 ; i <= C ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) { D [ i ] [ j ] = sc . nextInt ( ) ; } } for ( int i = 1 ; i <= N ; i ++ ) { for ( int j = 1 ; j <= N ; j ++ ) { int col = sc . nextInt ( ) ; table [ ( i + j ) % 3 ] [ col ] ++ ; } } int [ ] [ ] costable = new int [ 3 ] [ C + 1 ] ; for ( int i = 0 ; i < 3 ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) for ( int k = 1 ; k <= C ; k ++ ) { costable [ i ] [ k ] += D [ j ] [ k ] * table [ i ] [ j ] ; } } int min = 260000000 ; for ( int i = 1 ; i <= C ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) { for ( int k = 1 ; k <= C ; k ++ ) { if ( i != j && j != k && k != i ) { min = Math . min ( min , costable [ 0 ] [ i ] + costable [ 1 ] [ j ] + costable [ 2 ] [ k ] ) ; } } } } System . out . println ( min ) ; }
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