Tło

Mój syn Leonhard (4 lata) uwielbia labirynty. Nie wiem, skąd on zna labirynty, ale maluje je i wie całkiem dobrze, jak działają:

Ostatnio zaczął tworzyć grę ze swoich obrazów. Oto jego zasady:

• czarny kwadrat oznacza punkt początkowy.
• hak oznacza wyjście z labiryntu (tam zostajesz wyciągnięty).
• możesz zbierać korony.
• możesz zbierać bryłki złota (rzeczy okrągłe).
• możesz iść do przodu i do tyłu, ale nie więcej.
• strzałki mogą prowadzić do wyjścia. (Jeśli maluje dla mnie labirynt do rozwiązania, często wprowadzają w błąd).

Wersja z adnotacjami:

• niebieski: punkt początkowy
• pomarańczowy: korony
• żółty: obszar ze złotymi bryłkami
• zielony: hak (wyjście)
• różowy: strzałki (głównie wprowadzające w błąd)

Zadanie

Być może wiesz, że w wieku 4 lat dzieci zaczynają opowiadać wieprzowe ciasta, a czasami nie przestrzega własnych zasad, zwłaszcza jeśli dowiaduje się, że nie może już dotrzeć do końca labiryntu.

Właśnie tam wchodzisz: ponieważ i tak szukam gier dla dzieci , zamieniasz jego pomysł w grę, w której oszukiwanie nie jest możliwe.

Potrzebujemy więcej definicji, które powiedziałbym:

• boisko jest n* mprostokątem kwadratów o równej wielkości.
• kwadrat może mieć od 0 do 4 ścian, po jednej z każdej strony.
• korona jest warta 50 punktów.
• samorodek złota jest wart 20 punktów.
• chodzenie po już przejechanym kwadracie odejmuje 1 punkt.
• kwadraty są oznaczone w taki sposób, aby określić, jak często gracz po nim chodził (0, 1 lub 2 razy)
• gracz może chodzić w 4 kierunkach, z wyjątkiem muru.
• Urządzeniem wejściowym może być wszystko. Proszę rozważyć obsługę klawiatury.
• Labirynt musi być rozwiązalny. Tzn. Musi istnieć możliwość dotarcia do haka od punktu początkowego i musi być możliwe zebranie wszystkich kosztowności (nawet jeśli nie daje to najwyższego możliwego wyniku).
• Jeśli gracz utknie, gra się kończy.
• Gracz nie może umrzeć, spadając z planszy. Możesz postawić ścianę wokół całego labiryntu lub owinąć krawędzie, cokolwiek zechcesz.
• program pobiera na wejściu argument słowo (0–65535). To jest ziarno generatora liczb losowych. Ponowne wywołanie programu z tym samym nasieniem powoduje ten sam labirynt.

Premia:

• obliczyć maksymalną liczbę punktów, które można zebrać. Weź pod uwagę, że z powodu -1 punktów lepiej nie zbierać wszystkich przedmiotów.
• Pokaż najlepsze rozwiązanie (najkrótsza droga do uzyskania maksymalnej liczby punktów)

Zasady

To konkurs popularności, ponieważ chcę być w stanie przeczytać i zrozumieć kod i być może dostosować się do nowych pomysłów mojego syna. Przepraszamy, koduj golfistów, może chcesz utworzyć kopię tego pytania z regułami bardziej odpowiednimi do gry w golfa, np. Wersja konsoli ze wszystkimi zdefiniowanymi znakami.

Najpopularniejsza gra 3 maja stanie się akceptowaną odpowiedzią. I dlaczego nie opublikować go w sklepie z aplikacjami?

JavaScript

Praca w toku. Niestety labirynt nie zawsze jest do rozwiązania - ograniczenie przeszkód jest prawdziwą przeszkodą.

Edytuj 1 Kosmetyk
Edytuj 2 Lepsza rozgrywka, ale wciąż istnieje duży problem

var rows, columns, rowOfs, maze, plPos, points, playing

$('#BNEW').on('click', function() {
    NewMaze();
});
$('#BREP').on('click', function() {
    Start();
});

$(document).on('keydown', function(e) {
    var ok, move, pxy, mz, $td
    switch (e.which)
    {
    case 37:
        (move = -1, ok = maze[plPos+move] < 9 && maze[plPos+move*2] < 9);
        break;
    case 39:
        (move = 1, ok = maze[plPos+move] < 9 && maze[plPos+move*2] < 9);
        break;
    case 38: 
        (move = -rowOfs, ok = maze[plPos+move] < 9 && maze[plPos+move*2] < 9);
        break;
    case 40: 
        (move = rowOfs, ok = maze[plPos+move] < 9 && maze[plPos+move*2] < 9);
        break;
    }
    if (playing && ok)
    {
        pxy = getXY(plPos)
        mz = maze[plPos] < 8 ? 8 : 9;
        $td = $('#Field table tr').eq(pxy.y).find('td').eq(pxy.x)
        $td.addClass("m"+mz);
        maze[plPos] = mz;
        maze[plPos+move] = mz;
        plPos += move*2;
        mz = maze[plPos];
        PTS.value = mz==7 ? points += 20 : mz==6 ? points += 50 : mz == 8 ? points -= 1 : points;
        
        pxy = getXY(plPos)
        $td = $('#Field table tr').eq(pxy.y).find('td').eq(pxy.x)
        $td.removeClass("m6 m7")
        $('#Player').finish().animate(playerCss(pxy.x,pxy.y));
        CheckEndGame();
    }
    return !move
});

function CheckEndGame()
{
  var msg = ''
  if (maze[plPos] == 5)
  {
      msg = "Maze completed!";
  }
  else if (maze[plPos+1]==9 && maze[plPos-1]==9
        && maze[plPos+rowOfs]==9 && maze[plPos-rowOfs]==9)
  {
      msg = "You are stuck, try again!";
  }
  if (msg) {
    $("#Msg").text(msg).show();
    playing=false
  }
}

function seed(s) {
    return function() {
        s = Math.sin(s) * 10000; return s - Math.floor(s);
    };
};

function Build()
{
    var i
    var Fill = function(p)
    {
        var d=[rowOfs,-rowOfs,1,-1], i, s, l
        maze[p] = 1
        while(d[0])
        {
            i = random()*d.length|0
            s = d[i]
            if (s != (l=d.pop())) d[i]=l
            if (maze[p+s+s]>8) {
                maze[p+s] = 1, Fill(p+s+s)
            }
        }
    }
    rowOfs = (columns + 1) * 2
    maze = Array(rowOfs * (rows*2+1))
    for (i=0; i < maze.length; i++)
        maze[i] = i % rowOfs? 9 : 0
    Fill(rowOfs+2)
}

function NewMaze()
{
    SEED.value = Math.random()*65536 | 0
    Start()
}
    
function Start()
{
    var sd = SEED.value || 1
    columns = COLS.value |0 || 18
    rows = ROWS.value | 0 || 12
    COLS.value = columns
    ROWS.value = rows
    random = seed(sd)
    PTS.value = points = 0
    $("#Msg").hide();

    Build()
    
    plx = random()*columns|0;
    ply = random()*rows|0;
    setPlayer(plx,ply);
    plPos = getPos(plx,ply);
    BlockTriples(plPos);
    AddItems(plPos);
    Draw();
    playing = true;
  
}

function AddItems(p)
{
    var d=[rowOfs,-rowOfs,1,-1]
    var cells=[]
    // scan all reachable cells and calc distance from start
    var Go = function(p,l)
    {
        var i,t,mark,r
        ++l
        cells.push([p,l])
            
        maze[p] = 8;
        for(i=0; d[i]; i++)
        {
            t = d[i]
            if (maze[p+t]<2 && maze[p+t+t]<2) 
            {
                Go(p+t+t, l)
            }
        }
        maze[p] = 0;
    } 
    Go(p,0)
    cells.sort(function(a,b){return a[1]-b[1]})
    cells=cells.slice(10) // cut the shortest distances 
    r = random()*10|0; //exit
    r = cells.length-r-1
    maze[cells[r][0]] = 5;
    console.log(r)
    cells = cells.slice(0,r)
    var ncr = rows, nnu = columns
    for(i = ncr+nnu; i; i--) 
    {
        r = random()*cells.length|0
        maze[cells[r][0]] = (i > ncr ? 7 : 6);
        cells[r] = cells.pop();
    }
    
    
}

function BlockTriples(p)
{
    var d=[rowOfs,-rowOfs,1,-1]
    var Go = function(p)
    {
        var i,t,size=[0,0,0,0],s=1,nw=0,min,minp
        maze[p] = 8
        for(i=0; d[i]; i++)
        {
            t = d[i]
            if (maze[p+t]<9 && maze[p+t+t]<8) 
            {
                ++nw
                s += size[i] = Go(p+t+t)
            }
        }
        if (nw > 2) // triple way, block the smallest
        {
            for(i=0,min=1e6; d[i]; i++)
                size[i] && size[i] < min && (min = size[minp = i])
            maze[p + d[minp]] = 5;
        }
        maze[p]=0
        return s
    } 
    Go(p)
}
    
function Draw()
{    
    var q=[], i, x, y;
    for(i = rowOfs+2, y = 0; y < rows; y++)
    {
        q.push('<tr>')
        for (x = 0; x < columns; i += 2, x++)
        {
            tcl = 'm'+(maze[i]|0)       
            maze[i-1]>8 && (tcl += ' wl')
            maze[i+1]>8 && (tcl += ' wr')
            maze[i-rowOfs]>8 && (tcl += ' wu')
            maze[i+rowOfs]>8 && (tcl += ' wb')
            q.push('<td class="'+tcl+'"></td>')
        }
        q.push('</tr>')
        i += rowOfs+2
    }
    $("#TOUT").html(q.join(''));
    $("#Field").show();
}

function setPlayer(posx, posy)
{
    $('#Player').css(playerCss(posx, posy));
}    

function getXY(pos)
{
    return { x: (plPos % rowOfs)/2-1, y: plPos / rowOfs / 2 | 0}
}

function getPos(x, y)
{
   return (x+y*rowOfs)*2 + rowOfs+2;
}

function playerCss(posx, posy)
{
    return{ left: 6+posx*21, top: posy*21+2};
}

input { width: 3em; margin-right:1em }
table { 
  border: 2px solid #000; 
  border-collapse: collapse;
  font-size: 8px }
#Field { 
  margin: 10px; 
  position: relative;
  display: none;
}
td { 
    width: 19px; height: 19px; 
    padding: 0; margin: 0; 
    text-align: center;
}
td.wl { border-left: 2px solid #444; background: #fff }
td.wr { border-right: 2px solid #444; background: #fff }
td.wt { border-top: 2px solid #444;; background: #fff }
td.wb { border-bottom: 2px solid #444; background: #fff }
td.m7 { background: #ffd url(http://i.stack.imgur.com/QUInh.png) -21px 0}
td.m6 { background: #efe url(http://i.stack.imgur.com/QUInh.png) -1px 0}
td.m5 { background: #ddf url(http://i.stack.imgur.com/QUInh.png) -40px 0}
td.m8 { background: #eed }
td.m9 { background: #f55 }
#Player { position: absolute; top:0; left:0; color: #007; background: #fcb; font-size:12px }
#Msg { color: red; font-size:40px; display:none;  }

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
ID:<input id=SEED>
Rows:<input id=ROWS>
Columns:<input id=COLS>
<button id=BNEW>New</button>
<button id=BREP>Replay</button>
<div id=Msg></div>
<div id=Field>
<table id=TOUT border=0 cellspacing=0 cellpadding=0>
</table>
<span id=Player>⛄</span>    
</div>
Score: <input readonly id=PTS>

Jawa

Nigdy nie narzekałem na GolfScript lub CJam, ale i tak jest dla ciebie odpowiedź Java. To było naprawdę przyjemne wyzwanie. ;)

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.geom.Ellipse2D;
import java.util.*;
import javax.swing.*;

public class MazeMaker {
    int row, col, exitRow, exitCol, numCells, score, array[][];
    final int SQWIDTH = 20;
    boolean gameOver = true;
    Ellipse2D.Double ellipse;
    JFrame frame;
    JPanel mazePanel;
    JLabel scoreLabel;

    public MazeMaker() {
        frame = new JFrame("Maze");
        frame.setLayout(new BorderLayout());
        JPanel topPanel = createTopPanel();
        frame.add(topPanel,BorderLayout.NORTH);

        createMazePanel();
        frame.add(new JScrollPane(mazePanel),BorderLayout.CENTER);

        setKeyActions();

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

    private void constructArray(int seed, int rows, int cols) {
        array = new int[rows*2-1][cols*2-1];
        for (int[] a : array)
            Arrays.fill(a,-1);
        numCells = (array.length / 2 + 1) * (array[0].length / 2 + 1);
        Random rand = new Random(seed);
        int row = rand.nextInt(array.length / 2 + 1) * 2;
        int col = rand.nextInt(array[0].length / 2 + 1) * 2;
        array[row][col] = 0;
        boolean first = true, a = false, exitFound = false;

        while (true) {
            if (first) {
                int direction = rand.nextInt(4);
                if (direction == 0 && row != 0) {
                    array[row-1][col] = 0;
                    array[row-2][col] = 0;
                    row -= 2;
                    first = false;
                }
                else if (direction == 1 && col != array[0].length - 1) {
                    array[row][col+1] = 0;
                    array[row][col+2] = 0;
                    col += 2;
                    first = false;
                }
                else if (direction == 2 && row != array.length - 1) {
                    array[row+1][col] = 0;
                    array[row+2][col] = 0;
                    row += 2;
                    first = false;
                }
                else if (direction == 3 && col != 0) {
                    array[row][col-1] = 0;
                    array[row][col-2] = 0;
                    col -= 2;
                    first = false;
                }
            }
            else {
                int availableCells = 0;
                boolean up = false, down = false, left = false, right = false;
                if (row != 0 && array[row-2][col] == -1) {
                    availableCells++;
                    up = true;
                }

                if (col != array[0].length-1 && array[row][col+2] == -1) {
                    availableCells++;
                    right = true;
                }

                if (row != array.length-1 && array[row+2][col] == -1) {
                    availableCells++;
                    down = true;
                }

                if (col != 0 && array[row][col-2] == -1) {
                    availableCells++;
                    left = true;
                }

                if (availableCells != 0) {
                    a = true;
                    while (true) {
                        boolean[] b = {up,right,down,left};
                        int i = rand.nextInt(4);
                        if (b[i]) {
                            if (i == 0) {
                                array[row-1][col] = 0;
                                array[row-2][col] = 0;
                                row -= 2;
                            }
                            else if (i == 1) {
                                array[row][col+1] = 0;
                                array[row][col+2] = 0;
                                col += 2;
                            }
                            else if (i == 2) {
                                array[row+1][col] = 0;
                                array[row+2][col] = 0;
                                row += 2;
                            }
                            else if (i == 3) {
                                array[row][col-1] = 0;
                                array[row][col-2] = 0;
                                col -= 2;
                            }
                            break;
                        }
                    }
                }
                else {
                    array[row][col] = 1;
                    if (!exitFound && a) {
                        if (new Random().nextInt(5) == 0) {
                            exitFound = true;
                            exitRow = row;
                            exitCol = col;
                        }
                    }
                    a = false;
                    if (row != 0 && array[row-1][col] == 0 && (array[row-2][col] == 0 || array[row-2][col] == 1)) {
                        array[row-1][col] = 1;
                        array[row-2][col] = 1;
                        row -= 2;
                    }
                    else if (col != array[0].length-1 && array[row][col+1] == 0 && (array[row][col+2] == 0 || array[row][col+2] == 1)) {
                        array[row][col+1] = 1;
                        array[row][col+2] = 1;
                        col += 2;
                    }
                    else if (row != array.length-1 && array[row+1][col] == 0 && (array[row+2][col] == 0 || array[row+2][col] == 1)) {
                        array[row+1][col] = 1;
                        array[row+2][col] = 1;
                        row += 2;
                    }
                    else if (col != 0 && array[row][col-1] == 0 && (array[row][col-2] == 0 || array[row][col-2] == 1)) {
                        array[row][col-1] = 1;
                        array[row][col-2] = 1;
                        col -= 2;
                    }
                }
                if (checkDone()) {
                    if (!exitFound) {
                        exitRow = row;
                        exitCol = col;
                    }
                    break;
                }
            }
        }
    }

    private boolean checkDone() {
        int count = 0;
        for (int k = 0; k < array.length; k+=2) {
            for (int l = 0; l < array[0].length; l+=2) {
                if (array[k][l] == 0 || array[k][l] == 1)
                    count++;
            }
        }
        return count == numCells;
    }

    private JPanel createTopPanel() {
        GridBagLayout l = new GridBagLayout();
        GridBagConstraints c = new GridBagConstraints();
        c.fill = GridBagConstraints.BOTH;

        JPanel panel = new JPanel(l);
        JLabel inputLabel = new JLabel("ID:");
        c.gridwidth = 1;
        l.setConstraints(inputLabel,c);
        panel.add(inputLabel);

        JTextField inputField = new JTextField(5);
        l.setConstraints(inputField,c);
        panel.add(inputField);

        JLabel rowLabel = new JLabel("Rows:");
        l.setConstraints(rowLabel,c);
        panel.add(rowLabel);

        JTextField rowField = new JTextField(3);
        l.setConstraints(rowField,c);
        panel.add(rowField);

        JLabel colLabel = new JLabel("Columns:");
        l.setConstraints(colLabel,c);
        panel.add(colLabel);

        JTextField colField = new JTextField(3);
        l.setConstraints(colField,c);
        panel.add(colField);

        JButton applyButton = new JButton("Apply");
        applyButton.addActionListener(ev -> {
            try {
                int seed = Integer.parseInt(inputField.getText()),
                    rows = Integer.parseInt(rowField.getText()),
                    cols = Integer.parseInt(colField.getText());
                if (seed >= 0 && rows >= 3 && cols >= 3) {
                    gameOver = false;
                    scoreLabel.setText("Score: " + (score = 0));
                    constructArray(seed,rows,cols);
                    row = (int) (Math.random() * (array.length / 2 + 1)) * 2;
                    col = (int) (Math.random() * (array[0].length / 2 + 1)) * 2;
                    frame.setSize((1+SQWIDTH * array[0].length)/2 > 750 ? (1+SQWIDTH * array[0].length)/2 : 750,
                            75+(1+SQWIDTH * array.length)/2);
                    mazePanel.setPreferredSize(new Dimension(
                            (1+SQWIDTH * array[0].length)/2 > 750 ? (1+SQWIDTH * array[0].length)/2 - 15 : 750,
                            15+(1+SQWIDTH * array.length)/2));
                    ellipse = new Ellipse2D.Double(col*SQWIDTH/2+3,row*SQWIDTH/2+3,10,10);
                    setItems();
                    mazePanel.repaint();
                }
            } catch (NumberFormatException ignore) {}
        });
        l.setConstraints(applyButton,c);
        panel.add(applyButton);

        scoreLabel = new JLabel("Score: ");
        c.gridwidth = GridBagConstraints.REMAINDER;
        l.setConstraints(scoreLabel,c);
        panel.add(scoreLabel);

        return panel;
    }

    private void createMazePanel() {
        mazePanel = new JPanel() {
            @Override
            protected void paintComponent(Graphics g) {
                super.paintComponent(g);
                int x = 0, y = 0;
                if (!gameOver) {
                    for (int k = 0; k < array.length; k+=2) {
                        for (int l = 0; l < array[0].length; l+=2) {
                            int n = array[k][l];
                            if (n == 0 || n == 1 || n == 4 || n == 5 || n == 6)
                                g.setColor(Color.white);
                            else if (n == 2)
                                g.setColor(Color.green);
                            else if (n == 3)
                                g.setColor(Color.red);
                            g.fillRect(x, y, SQWIDTH, SQWIDTH);
                            if (n == 4) {
                                g.setColor(new Color(245,209,34));
                                g.fillOval(x+3, y+3, 10, 10);
                            }
                            else if (n == 5) {
                                g.setColor(new Color(255,223,55));
                                g.fillPolygon(new int[]{x,x+3,x+8,x+13,x+16,x+14,x+2},new int[]{y+2,y+6,y+2,y+6,y+2,y+16,y+16},7);
                                g.setColor(new Color(12,234,44));
                                g.fillOval(x+7,y+6,4,7);
                            }
                            else if (n == 6) {
                                Graphics2D g2 = (Graphics2D) g.create();
                                g2.setStroke(new BasicStroke(2,BasicStroke.CAP_ROUND,BasicStroke.JOIN_ROUND));
                                g2.setColor(new Color(108,225,119));
                                g2.drawOval(x+5, y+1, 8, 8);
                                g2.drawLine(x+5, y+3, x+5, y+11);
                                g2.drawArc(x+5, y+8, 7, 7, 180, 180);
                            }
                            g.setColor(Color.black);
                            if (k != array.length-1 && array[k+1][l] == -1)
                                g.fillRect(x-3, y+SQWIDTH-3, SQWIDTH+3, 3);
                            if (l != array[0].length-1 && array[k][l+1] == -1)
                                g.fillRect(x+SQWIDTH-3,y,3,SQWIDTH);
                            x += SQWIDTH;
                        }
                        x = 0;
                        y += SQWIDTH;
                    }
                    g.setColor(Color.red);
                    ((Graphics2D) g).fill(ellipse);
                }
            }
        };
    }

    private void setKeyActions() {
        InputMap im = mazePanel.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
        ActionMap am = mazePanel.getActionMap();

        im.put(KeyStroke.getKeyStroke("pressed UP"), "up");
        am.put("up", new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                if (row != 0 && array[row-1][col] != -1 && array[row-2][col] != 3 && !gameOver) {
                    int n = array[row][col];
                    array[row][col] = n == 0 || n == 1 || n == 4 || n == 5 ? 2 : 3;
                    row -= 2;
                    n = array[row][col];
                    if (n == 4)
                        scoreLabel.setText("Score: " + (score += 20));
                    else if (n == 5)
                        scoreLabel.setText("Score: " + (score += 50));
                    else if (n == 2)
                        scoreLabel.setText("Score: " + (score -= 1));
                    ellipse.y = row * SQWIDTH/2 + 3;
                    mazePanel.repaint();
                }
                if (!gameOver && array[row][col] == 6) {
                    JOptionPane.showMessageDialog(frame, "Huzzah! You found the exit! ", "Finish", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
                else if (!gameOver && checkGameOver()) {
                    JOptionPane.showMessageDialog(frame, "You got trapped! Try again!", "Game over", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
            }
        });

        im.put(KeyStroke.getKeyStroke("pressed RIGHT"), "right");
        am.put("right",new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                if (col != array[0].length-1 && array[row][col+1] != -1 && array[row][col+2] != 3 && !gameOver) {
                    int n = array[row][col];
                    array[row][col] = n == 0 || n == 1 || n == 4 || n == 5 ? 2 : 3;
                    col += 2;
                    n = array[row][col];
                    if (n == 4)
                        scoreLabel.setText("Score: " + (score += 20));
                    else if (n == 5)
                        scoreLabel.setText("Score: " + (score += 50));
                    else if (n == 2)
                        scoreLabel.setText("Score: " + (score -= 1));
                    ellipse.x = col * SQWIDTH/2 + 3;
                    mazePanel.repaint();
                }
                if (!gameOver && array[row][col] == 6) {
                    JOptionPane.showMessageDialog(frame, "Huzzah! You found the exit! ", "Finish", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
                else if (!gameOver && checkGameOver()) {
                    JOptionPane.showMessageDialog(frame, "You got trapped! Try again!", "Game over", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
            }
        });

        im.put(KeyStroke.getKeyStroke("pressed DOWN"), "down");
        am.put("down", new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                if (row != array.length-1 && array[row+1][col] != -1 && array[row+2][col] != 3 && !gameOver) {
                    int n = array[row][col];
                    array[row][col] = n == 0 || n == 1 || n == 4 || n == 5 ? 2 : 3;
                    row += 2;
                    n = array[row][col];
                    if (n == 4)
                        scoreLabel.setText("Score: " + (score += 20));
                    else if (n == 5)
                        scoreLabel.setText("Score: " + (score += 50));
                    else if (n == 2)
                        scoreLabel.setText("Score: " + (score -= 1));
                    ellipse.y = row * SQWIDTH/2 + 3;
                    mazePanel.repaint();
                }
                if (!gameOver && array[row][col] == 6) {
                    JOptionPane.showMessageDialog(frame, "Huzzah! You found the exit! ", "Finish", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
                else if (!gameOver && checkGameOver()) {
                    JOptionPane.showMessageDialog(frame, "You got trapped! Try again!", "Game over", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
            }
        });

        im.put(KeyStroke.getKeyStroke("pressed LEFT"), "left");
        am.put("left",new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent ev) {
                if (col != 0 && array[row][col-1] != -1 && array[row][col-2] != -1 && !gameOver) {
                    int n = array[row][col];
                    array[row][col] = n == 0 || n == 1 || n == 4 || n == 5 ? 2 : 3;
                    col -= 2;
                    n = array[row][col];
                    if (n == 4)
                        scoreLabel.setText("Score: " + (score += 20));
                    else if (n == 5)
                        scoreLabel.setText("Score: " + (score += 50));
                    else if (n == 2)
                        scoreLabel.setText("Score: " + (score -= 1));
                    ellipse.x = col * SQWIDTH/2 + 3;
                    mazePanel.repaint();
                }
                if (!gameOver && array[row][col] == 6) {
                    JOptionPane.showMessageDialog(frame, "Huzzah! You found the exit! ", "Finish", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
                else if (!gameOver && checkGameOver()) {
                    JOptionPane.showMessageDialog(frame, "You got trapped! Try again!", "Game over", JOptionPane.PLAIN_MESSAGE);
                    gameOver = true;
                }
            }
        });
    }

    private void setItems() {
        array[exitRow][exitCol] = 6;
        Random r = new Random();
        for (int k = 1; k < (array.length * array[0].length) / 20; k++) {
            int row = r.nextInt(array.length / 2 + 1) * 2,
                col = r.nextInt(array[0].length / 2 + 1) * 2;
            if ((row == this.row && col == this.col) || array[row][col] == 4 || array[row][col] == 5 || array[row][col] == 6)
                k--;
            else
                array[row][col] = r.nextInt(2) + 4;
        }
    }

    private boolean checkGameOver() {
        if (row == 0 && col == 0)
            return (array[row+2][col] == 3 && array[row][col+2] == 3) ||
                   (array[row+1][col] == -1 && array[row][col+2] == 3) ||
                   (array[row+2][col] == 3 && array[row][col+1] == -1);
        else if (row == 0 && col == array[0].length-1)
            return (array[row+2][col] == 3 && array[row][col-2] == 3) ||
                   (array[row+1][col] == -1 && array[row][col-2] == 3) ||
                   (array[row+2][col] == 3 && array[row][col-1] == -1);
        else if (row == array.length-1 && col == 0)
            return (array[row-2][col] == 3 && array[row][col+2] == 3) ||
                   (array[row-1][col] == -1 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row][col+1] == -1);
        else if (row == array.length-1 && col == array[0].length-1)
            return (array[row-2][col] == 3 && array[row][col-2] == 3) ||
                   (array[row-1][col] == -1 && array[row][col-2] == 3) ||
                   (array[row-2][col] == 3 && array[row][col-1] == -1);
        else if (row == 0)
            return (array[row+2][col] == 3 && array[row][col-1] == -1 && array[row][col+1] == -1) ||
                   (array[row+1][col] == -1 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row+1][col] == -1 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row+1][col] == -1 && array[row][col-2] == 3 && array[row][col+2] == 3) ||
                   (array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row+2][col] == 3 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+2] == 3);
        else if (col == 0)
            return (array[row][col+2] == 3 && array[row-1][col] == -1 && array[row+1][col] == -1) ||
                   (array[row][col+1] == -1 && array[row-2][col] == 3 && array[row+1][col] == -1) ||
                   (array[row][col+1] == -1 && array[row-1][col] == -1 && array[row+2][col] == 3) ||
                   (array[row][col+1] == -1 && array[row-2][col] == 3 && array[row+2][col] == 3) ||
                   (array[row][col+2] == 3 && array[row-2][col] == 3 && array[row+1][col] == -1) ||
                   (array[row][col+2] == 3 && array[row-1][col] == -1 && array[row+2][col] == 3) ||
                   (array[row][col+2] == 3 && array[row-2][col] == 3 && array[row+2][col] == 3);
        else if (row == array.length-1)
            return (array[row-2][col] == 3 && array[row][col-1] == -1 && array[row][col+1] == -1) ||
                   (array[row-1][col] == -1 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row-1][col] == -1 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row-1][col] == -1 && array[row][col-2] == 3 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row-2][col] == 3 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row][col-2] == 3 && array[row][col+2] == 3);
        else if (col == array[0].length-1)
            return (array[row][col-2] == 3 && array[row-1][col] == -1 && array[row+1][col] == -1) ||
                   (array[row][col-1] == -1 && array[row-2][col] == 3 && array[row+1][col] == -1) ||
                   (array[row][col-1] == -1 && array[row-1][col] == -1 && array[row+2][col] == 3) ||
                   (array[row][col-1] == -1 && array[row-2][col] == 3 && array[row+2][col] == 3) ||
                   (array[row][col-2] == 3 && array[row-2][col] == 3 && array[row+1][col] == -1) ||
                   (array[row][col-2] == 3 && array[row-1][col] == -1 && array[row+2][col] == 3) ||
                   (array[row][col-2] == 3 && array[row-2][col] == 3 && array[row+2][col] == 3);
        else
            return (array[row-2][col] == 3 && array[row][col+1] == -1 && array[row+1][col] == -1 && array[row][col-1] == -1) ||
                   (array[row-1][col] == -1 && array[row][col+2] == 3 && array[row+1][col] == -1 && array[row][col-1] == -1) ||
                   (array[row-1][col] == -1 && array[row][col+1] == -1 && array[row+2][col] == 3 && array[row][col-1] == -1) ||
                   (array[row-1][col] == -1 && array[row][col+1] == -1 && array[row+1][col] == -1 && array[row][col-2] == 3) ||
                   (array[row-1][col] == -1 && array[row+1][col] == -1 && array[row][col-2] == 3 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row+2][col] == 3 && array[row][col-1] == -1 && array[row][col+1] == -1) ||
                   (array[row-2][col] == 3 && array[row+1][col] == -1 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row-1][col] == -1 && array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row-1][col] == -1 && array[row+2][col] == 3 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row+1][col] == -1 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row-1][col] == -1 && array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row+1][col] == -1 && array[row][col-2] == 3 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row+2][col] == 3 && array[row][col-1] == -1 && array[row][col+2] == 3) ||
                   (array[row-2][col] == 3 && array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+1] == -1) ||
                   (array[row-2][col] == 3 && array[row+2][col] == 3 && array[row][col-2] == 3 && array[row][col+2] == 3);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(MazeMaker::new);
    }
}