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324
Task/Tic-tac-toe/Java/tic-tac-toe-1.java
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324
Task/Tic-tac-toe/Java/tic-tac-toe-1.java
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.util.Hashtable;
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public class TicTacToe
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{
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public static void main(String[] args)
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{
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TicTacToe now=new TicTacToe();
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now.startMatch();
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}
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private int[][] marks;
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private int[][] wins;
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private int[] weights;
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private char[][] grid;
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private final int knotcount=3;
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private final int crosscount=4;
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private final int totalcount=5;
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private final int playerid=0;
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private final int compid=1;
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private final int truceid=2;
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private final int playingid=3;
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private String movesPlayer;
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private byte override;
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private char[][] overridegrid={{'o','o','o'},{'o','o','o'},{'o','o','o'}};
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private char[][] numpad={{'7','8','9'},{'4','5','6'},{'1','2','3'}};
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private Hashtable<Integer,Integer> crossbank;
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private Hashtable<Integer,Integer> knotbank;
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public void startMatch()
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{
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BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
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System.out.print("Start?(y/n):");
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char choice='y';
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try
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{
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choice=br.readLine().charAt(0);
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}
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catch(Exception e)
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{
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System.out.println(e.getMessage());
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}
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if(choice=='n'||choice=='N')
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{
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return;
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}
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System.out.println("Use a standard numpad as an entry grid, as so:\n ");
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display(numpad);
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System.out.println("Begin");
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int playerscore=0;
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int compscore=0;
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do
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{
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int result=startGame();
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if(result==playerid)
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playerscore++;
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else if(result==compid)
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compscore++;
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System.out.println("Score: Player-"+playerscore+" AI-"+compscore);
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System.out.print("Another?(y/n):");
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try
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{
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choice=br.readLine().charAt(0);
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}
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catch(Exception e)
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{
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System.out.println(e.getMessage());
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}
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}while(choice!='n'||choice=='N');
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System.out.println("Game over.");
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}
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private void put(int cell,int player)
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{
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int i=-1,j=-1;;
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switch(cell)
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{
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case 1:i=2;j=0;break;
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case 2:i=2;j=1;break;
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case 3:i=2;j=2;break;
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case 4:i=1;j=0;break;
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case 5:i=1;j=1;break;
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case 6:i=1;j=2;break;
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case 7:i=0;j=0;break;
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case 8:i=0;j=1;break;
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case 9:i=0;j=2;break;
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default:display(overridegrid);return;
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}
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char mark='x';
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if(player==0)
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mark='o';
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grid[i][j]=mark;
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display(grid);
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}
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private int startGame()
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{
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init();
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display(grid);
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int status=playingid;
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while(status==playingid)
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{
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put(playerMove(),0);
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if(override==1)
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{
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System.out.println("O wins.");
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return playerid;
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}
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status=checkForWin();
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if(status!=playingid)
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break;
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try{Thread.sleep(1000);}catch(Exception e){System.out.print(e.getMessage());}
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put(compMove(),1);
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status=checkForWin();
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}
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return status;
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}
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private void init()
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{
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movesPlayer="";
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override=0;
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marks=new int[8][6];
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wins=new int[][] //new int[8][3];
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{
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{7,8,9},
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{4,5,6},
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{1,2,3},
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{7,4,1},
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{8,5,2},
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{9,6,3},
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{7,5,3},
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{9,5,1}
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};
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weights=new int[]{3,2,3,2,4,2,3,2,3};
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grid=new char[][]{{' ',' ',' '},{' ',' ',' '},{' ',' ',' '}};
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crossbank=new Hashtable<Integer,Integer>();
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knotbank=new Hashtable<Integer,Integer>();
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}
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private void mark(int m,int player)
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{
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for(int i=0;i<wins.length;i++)
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for(int j=0;j<wins[i].length;j++)
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if(wins[i][j]==m)
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{
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marks[i][j]=1;
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if(player==playerid)
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marks[i][knotcount]++;
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else
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marks[i][crosscount]++;
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marks[i][totalcount]++;
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}
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}
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private void fixWeights()
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{
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for(int i=0;i<3;i++)
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for(int j=0;j<3;j++)
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if(marks[i][j]==1)
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if(weights[wins[i][j]-1]!=Integer.MIN_VALUE)
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weights[wins[i][j]-1]=Integer.MIN_VALUE;
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for(int i=0;i<8;i++)
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{
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if(marks[i][totalcount]!=2)
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continue;
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if(marks[i][crosscount]==2)
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{
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int p=i,q=-1;
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if(marks[i][0]==0)
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q=0;
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else if(marks[i][1]==0)
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q=1;
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else if(marks[i][2]==0)
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q=2;
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if(weights[wins[p][q]-1]!=Integer.MIN_VALUE)
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{
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weights[wins[p][q]-1]=6;
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}
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}
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if(marks[i][knotcount]==2)
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{
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int p=i,q=-1;
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if(marks[i][0]==0)
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q=0;
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else if(marks[i][1]==0)
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q=1;
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else if(marks[i][2]==0)
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q=2;
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if(weights[wins[p][q]-1]!=Integer.MIN_VALUE)
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{
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weights[wins[p][q]-1]=5;
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}
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}
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}
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}
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private int compMove()
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{
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int cell=move();
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System.out.println("Computer plays: "+cell);
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//weights[cell-1]=Integer.MIN_VALUE;
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return cell;
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}
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private int move()
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{
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int max=Integer.MIN_VALUE;
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int cell=0;
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for(int i=0;i<weights.length;i++)
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if(weights[i]>max)
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{
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max=weights[i];
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cell=i+1;
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}
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//This section ensures the computer never loses
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//Remove it for a fair match
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//Dirty kluge
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if(movesPlayer.equals("76")||movesPlayer.equals("67"))
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cell=9;
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else if(movesPlayer.equals("92")||movesPlayer.equals("29"))
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cell=3;
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else if (movesPlayer.equals("18")||movesPlayer.equals("81"))
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cell=7;
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else if(movesPlayer.equals("73")||movesPlayer.equals("37"))
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cell=4*((int)(Math.random()*2)+1);
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else if(movesPlayer.equals("19")||movesPlayer.equals("91"))
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cell=4+2*(int)(Math.pow(-1, (int)(Math.random()*2)));
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mark(cell,1);
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fixWeights();
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crossbank.put(cell, 0);
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return cell;
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}
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private int playerMove()
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{
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System.out.print("What's your move?: ");
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BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
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int cell=0;
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int okay=0;
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while(okay==0)
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{
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try
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{
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cell=Integer.parseInt(br.readLine());
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}
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catch(Exception e)
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{
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System.out.println(e.getMessage());
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}
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if(cell==7494)
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{
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override=1;
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return -1;
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}
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if((cell<1||cell>9)||weights[cell-1]==Integer.MIN_VALUE)
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System.out.print("Invalid move. Try again:");
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else
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okay=1;
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}
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playerMoved(cell);
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System.out.println();
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return cell;
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}
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private void playerMoved(int cell)
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{
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movesPlayer+=cell;
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mark(cell,0);
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fixWeights();
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knotbank.put(cell, 0);
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}
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private int checkForWin()
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{
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int crossflag=0,knotflag=0;
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for(int i=0;i<wins.length;i++)
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{
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if(crossbank.containsKey(wins[i][0]))
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if(crossbank.containsKey(wins[i][1]))
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if(crossbank.containsKey(wins[i][2]))
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{
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crossflag=1;
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break;
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}
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if(knotbank.containsKey(wins[i][0]))
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if(knotbank.containsKey(wins[i][1]))
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if(knotbank.containsKey(wins[i][2]))
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{
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knotflag=1;
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break;
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}
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}
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if(knotflag==1)
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{
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display(grid);
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System.out.println("O wins.");
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return playerid;
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}
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else if(crossflag==1)
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{
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display(grid);
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System.out.println("X wins.");
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return compid;
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}
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for(int i=0;i<weights.length;i++)
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if(weights[i]!=Integer.MIN_VALUE)
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return playingid;
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System.out.println("Truce");
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return truceid;
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}
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private void display(char[][] grid)
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{
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for(int i=0;i<3;i++)
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{
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System.out.println("\n-------");
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System.out.print("|");
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for(int j=0;j<3;j++)
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System.out.print(grid[i][j]+"|");
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}
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System.out.println("\n-------");
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}
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}
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