public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int C = sc . nextInt ( ) ;
  int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ;
  for ( int i = 1 ;
  i <= C ;
  i ++ ) {
    for ( int j = 1 ;
    j <= C ;
    j ++ ) {
      D [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  int [ ] [ ] c = new int [ N + 1 ] [ N + 1 ] ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    for ( int j = 1 ;
    j <= N ;
    j ++ ) {
      c [ i ] [ j ] = sc . nextInt ( ) ;
    }
  }
  int [ ] [ ] colorNums = new int [ C + 1 ] [ 3 ] ;
  for ( int i = 1 ;
  i <= N ;
  i ++ ) {
    for ( int j = 1 ;
    j <= N ;
    j ++ ) {
      colorNums [ c [ i ] [ j ] ] [ ( i + j ) % 3 ] ++ ;
    }
  }
  int minDSum = Integer . MAX_VALUE ;
  for ( int c1 = 1 ;
  c1 <= C ;
  c1 ++ ) {
    for ( int c2 = 1 ;
    c2 <= C ;
    c2 ++ ) {
      if ( c1 == c2 ) {
        continue ;
      }
      for ( int c3 = 1 ;
      c3 <= C ;
      c3 ++ ) {
        if ( c1 == c3 || c2 == c3 ) {
          continue ;
        }
        int tmp = 0 ;
        for ( int cOrg = 1 ;
        cOrg <= C ;
        cOrg ++ ) {
          tmp += colorNums [ cOrg ] [ 0 ] * D [ cOrg ] [ c1 ] ;
          tmp += colorNums [ cOrg ] [ 1 ] * D [ cOrg ] [ c2 ] ;
          tmp += colorNums [ cOrg ] [ 2 ] * D [ cOrg ] [ c3 ] ;
        }
        minDSum = Math . min ( minDSum , tmp ) ;
      }
    }
  }
  out . println ( minDSum ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; int C = sc . nextInt ( ) ; int [ ] [ ] D = new int [ C + 1 ] [ C + 1 ] ; for ( int i = 1 ; i <= C ; i ++ ) { for ( int j = 1 ; j <= C ; j ++ ) { D [ i ] [ j ] = sc . nextInt ( ) ; } } int [ ] [ ] c = new int [ N + 1 ] [ N + 1 ] ; for ( int i = 1 ; i <= N ; i ++ ) { for ( int j = 1 ; j <= N ; j ++ ) { c [ i ] [ j ] = sc . nextInt ( ) ; } } int [ ] [ ] colorNums = new int [ C + 1 ] [ 3 ] ; for ( int i = 1 ; i <= N ; i ++ ) { for ( int j = 1 ; j <= N ; j ++ ) { colorNums [ c [ i ] [ j ] ] [ ( i + j ) % 3 ] ++ ; } } int minDSum = Integer . MAX_VALUE ; for ( int c1 = 1 ; c1 <= C ; c1 ++ ) { for ( int c2 = 1 ; c2 <= C ; c2 ++ ) { if ( c1 == c2 ) { continue ; } for ( int c3 = 1 ; c3 <= C ; c3 ++ ) { if ( c1 == c3 || c2 == c3 ) { continue ; } int tmp = 0 ; for ( int cOrg = 1 ; cOrg <= C ; cOrg ++ ) { tmp += colorNums [ cOrg ] [ 0 ] * D [ cOrg ] [ c1 ] ; tmp += colorNums [ cOrg ] [ 1 ] * D [ cOrg ] [ c2 ] ; tmp += colorNums [ cOrg ] [ 2 ] * D [ cOrg ] [ c3 ] ; } minDSum = Math . min ( minDSum , tmp ) ; } } } out . println ( minDSum ) ; }
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name: (identifier) value: (array_creation_expression type: (integral_type) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (decimal_integer_literal))) dimensions: (dimensions_expr (binary_expression left: (identifier) right: (decimal_integer_literal)))))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (assignment_expression left: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier)) right: 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(local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) right: (identifier)) update: (update_expression (identifier)) body: (block (expression_statement (update_expression (array_access array: (array_access array: (identifier) index: (array_access array: (array_access array: (identifier) index: (identifier)) index: (identifier))) index: (binary_expression left: (parenthesized_expression (binary_expression left: (identifier) right: (identifier))) right: (decimal_integer_literal))))))))) (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (field_access object: (identifier) field: (identifier)))) (for_statement init: (local_variable_declaration type: (integral_type) declarator: (variable_declarator name: (identifier) value: (decimal_integer_literal))) condition: (binary_expression left: (identifier) 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