void Solve(StreamScanner ss, StreamWriter sw)
{
//---------------------------------
var N = ss.Next(int.Parse);
var C = ss.Next(int.Parse);
var D = ss.Next(int.Parse, C, C);
var cs = new int [3, C + 1];
for (var i = 0; i < N; i++)
{
for (var j = 0; j < N; j++)
{
cs[(i + j) % 3, ss.Next(int.Parse)]++;
}
}
var ans = int.MaxValue;
for (var i = 1; i <= C; i++)
{
for (var j = 1; j <= C; j++)
{
for (var k = 1; k <= C; k++)
{
if (i == j || j == k || k == i)
{
continue;
}
var total = 0;
for (var c = 1; c <= C; c++)
{
total += cs[0, c] * D[c - 1][i - 1];
total += cs[1, c] * D[c - 1][j - 1];
total += cs[2, c] * D[c - 1][k - 1];
}
ans = Math.Min(ans, total);
}
}
}
sw.WriteLine(ans);
//---------------------------------
}