Method init

app/src/main/java/solver/Domino.java:17–54

()

    private static boolean ini = false;
    private static void init() {
        if (ini) return;
        long t = System.currentTimeMillis();
        int[] arr = new int[8];
        int[] temp = new int[8];
        for (int i = 0; i < 40320; i++) {
            Utils.set8Perm(temp, 8, i);
            for (int j = 0; j < 5; j++) {
                //Util.set8Perm(arr, i);
                System.arraycopy(temp, 0, arr, 0, 8);
                switch (j) {
                    case 0: Utils.circle(arr, 0, 3, 2, 1); break;	//U
                    case 1: Utils.swap(arr, 0, 7, 3, 4); break;	//L
                    case 2: Utils.swap(arr, 1, 6, 2, 5); break;	//R
                    case 3: Utils.swap(arr, 3, 6, 2, 7); break;	//F
                    case 4: Utils.swap(arr, 0, 5, 1, 4); break;	//B
                }
                cpm[i][j] = (char) Utils.get8Perm(arr, 8);
                System.arraycopy(temp, 0, arr, 0, 8);
                switch (j) {
                    case 0: Utils.circle(arr, 0, 3, 2, 1); break;	//U
                    case 1: Utils.swap(arr, 3, 7); break;	//L
                    case 2: Utils.swap(arr, 1, 5); break;	//R
                    case 3: Utils.swap(arr, 2, 6); break;	//F
                    case 4: Utils.swap(arr, 0, 4); break;	//B
                }
                epm[i][j] = (char) Utils.get8Perm(arr, 8);
            }
        }

        for (int i = 1; i < 40320; i++) cpd[i] = epd[i] = -1;
        cpd[0] = epd[0] = 0;
        Utils.createPrun(cpd, 13, cpm, 3);
        Utils.createPrun(epd, 11, epm, 3);
        t = System.currentTimeMillis() - t;
        //Log.w("dct", "init " + t + "ms");
        ini = true;
    }

    private static boolean search(int cp, int ep, int d, int lf) {
        if (d == 0) return cp == 0 && ep == 0;