public class Ratsut {
    private static int laske(int n) {
        int laskuri = 0;
        for (int y1 = 0; y1 < n; y1++)
        for (int x1 = 0; x1 < n; x1++)
        for (int y2 = 0; y2 < n; y2++)
        for (int x2 = 0; x2 < n; x2++) {
            if (y1 == y2 && x1 == x2) continue;
            if (Math.abs(y1-y2) == 1 && Math.abs(x1-x2) == 2) continue;
            if (Math.abs(y1-y2) == 2 && Math.abs(x1-x2) == 1) continue;
            laskuri++;
        }
        return laskuri/2;
    }

    public static void main(String[] args) {
        System.out.println(laske(10));
    }
}