using System;
using System.Collections.Generic;
using System.Linq;
using static System.Console;
using static System.Math;
using static System.Array;

class MainClass : Scanner
{
    static void Main()
    {
        var (N, C) = ReadStream<int,int>();
        var D = new int[C, C];
        for (int i = 0; i < C; i++)
        {
            var line = RInts();
            for (int j = 0; j < C; j++)
            {
                D[i, j] = line[j];
            }
        }
        var c = new int[N, N];
        for (int i = 0; i < N; i++)
        {
            var line = RInts(_=>int.Parse(_)-1);
            for (int j = 0; j < N; j++)
            {
                c[i, j] = line[j];
            }
        }
        /*
        for (int k = 0; k < C; k++)
        {
            for (int i = 0; i < C; i++)
            {
                for (int j = 0; j < C; j++)
                {
                    D[i, j] = Min(D[i, j], D[i, k] + D[k, j]);
                }
            }
        }
        */
        
        var colors = new int[3, C];
        for (int i = 0; i < N; i++)
        {
            for (int j = 0; j < N; j++)
            {
                colors[(i + j) % 3, c[i, j]]++;
            }
        }
        long ans = long.MaxValue;
        for (int i = 0; i < C; i++)
        {
            for (int j = 0; j < C; j++)
            {
                for (int k = 0; k < C; k++)
                {
                    if (i == j || j == k || k == i) continue;
                    long sum = 0;
                    for (int a = 0; a < C; a++)
                    {
                        sum += D[a, i] * colors[0, a];
                        sum += D[a, j] * colors[1, a];
                        sum += D[a, k] * colors[2, a];
                    }
                    ans = Min(ans, sum);
                }
            }
        }
        WriteLine(ans);
    }
}

class Scanner
{
    public static int RInt() => int.Parse(Console.ReadLine());
    public static long RLong() => long.Parse(Console.ReadLine());
    public static string RString() => Console.ReadLine();
    public static double RDouble() => double.Parse(Console.ReadLine());

    public static int[] RInts() => Array.ConvertAll(Console.ReadLine().Split(), int.Parse);
    public static int[] RInts(Func<string, int> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static long[] RLongs() => Array.ConvertAll(Console.ReadLine().Split(), long.Parse);
    public static long[] RLongs(Func<string, long> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static double[] RDoubles() => Array.ConvertAll(Console.ReadLine().Split(), double.Parse);
    public static double[] RDoubles(Func<string, double> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static string[] RStrings() => Console.ReadLine().Split();
    //public static string[] RStrings(Func<string, string> func) => Console.ReadLine().Split().Select(func).ToArray();
    public static T1 ReadStream<T1>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        return r1;
    }
    public static (T1, T2) ReadStream<T1, T2>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        return (r1, r2);
    }
    public static (T1, T2, T3) ReadStream<T1, T2, T3>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        var r3 = (T3)Convert.ChangeType(r[2], typeof(T3));
        return (r1, r2, r3);
    }
    public static (T1, T2, T3, T4) ReadStream<T1, T2, T3, T4>()
    {
        var r = RStrings();
        var r1 = (T1)Convert.ChangeType(r[0], typeof(T1));
        var r2 = (T2)Convert.ChangeType(r[1], typeof(T2));
        var r3 = (T3)Convert.ChangeType(r[2], typeof(T3));
        var r4 = (T4)Convert.ChangeType(r[3], typeof(T4));
        return (r1, r2, r3, r4);
    }
}

Measured memory_bytes: 42548