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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
package nim;
 
public class Nim {
 
    private static int [] _piles;
 
    public String toString(){
        return "Pile 0 has: " + getPile(0) + " bricks left. | Pile 1 has: " + getPile(1) + " bricks left | Pile 2 has: " + getPile(2) + " bricks left.";
    }
 
    //Sette antall brikker
    public Nim(){
         _piles = new int [3];
         _piles[0] = 10;
         _piles[1] = 10;
         _piles[2] = 10;
    }
 
    public Nim(int pileSize){
        _piles = new int [3];
        _piles[0] = pileSize;
        _piles[1] = pileSize;
        _piles[2] = pileSize;
    }
 
    public static boolean isValidPile(int pile){
        if ((pile!=0||pile!=1||pile!=2)){
            return false;
        }else
            return true;
    }
 
 
    void removePieces(int number, int targetPile){
        if (!(isValidMove(number,targetPile))){
            throw new IllegalArgumentException("number or targetPile is not valid: " + number + "|" + targetPile );
        }else{
            _piles[targetPile] -= number;
        }
    }
 
    boolean isValidMove(int number, int targetPile){
        if ((number >= 1) && (!isValidPile(targetPile))){
            return true;
        }else{
            throw new IllegalArgumentException("Number has to be 1 or higher or target pile was not viable: num = " + number + "targetPile = " + targetPile);
        }
    }
 
    static boolean isGameOver(){
        for(int i=0; i < 3; i++){
            if (getPile(i) != 0){
                return false;
            }
        }
        return true;
    }
 
    static int getPile(int targetPile){
        if (isValidPile(targetPile)){
            throw new IllegalArgumentException("Target Pile is not valid: " + targetPile);
        }else{
        return _piles[targetPile];
        }
    }
 
 
 
}
	}
}
package nim;
 
import java.util.Scanner;
 
public class NimProgram extends Nim {
 
    private Nim nim;
    public static void main(String[] args){
 
        /deklarer variabler*/
        int targetPile = 0;/hvilken haug å velge/
        int number = 0;/** hvor mange brikker å fjerne/
 
        Scanner input = new Scanner(System.in);
 
        Nim game = new Nim();
 
        while (!isGameOver()){
            System.out.println(game.toString());
 
            System.out.print("Choose the pile you would like yo remove from(0,1,2): ");
            targetPile = input.nextInt();
 
            System.out.print("Choose the amount you would like to remove: ");
            number = input.nextInt();
 
            game.removePieces(number, targetPile);
 
        }
    }
 
}

Main.java:12: error: illegal start of expression
package nim;
^
Main.java:12: error: not a statement
package nim;
        ^
Main.java:14: error: illegal start of expression
public class Nim {
^
Main.java:83: error: class, interface, or enum expected
package nim;
^
Main.java:85: error: class, interface, or enum expected
import java.util.Scanner;
^
Main.java:92: error: illegal start of expression
        /deklarer variabler*/
        ^
Main.java:92: error: ';' expected
        /deklarer variabler*/
                 ^
Main.java:92: error: illegal start of expression
        /deklarer variabler*/
                            ^
Main.java:93: error: '.class' expected
        int targetPile = 0;/hvilken haug ? velge/
            ^
Main.java:93: error: illegal start of expression
        int targetPile = 0;/hvilken haug ? velge/
                       ^
Main.java:93: error: ';' expected
        int targetPile = 0;/hvilken haug ? velge/
                        ^
Main.java:93: error: illegal start of expression
        int targetPile = 0;/hvilken haug ? velge/
                           ^
Main.java:93: error: ';' expected
        int targetPile = 0;/hvilken haug ? velge/
                                   ^
Main.java:93: error: ';' expected
        int targetPile = 0;/hvilken haug ? velge/
                                          ^
Main.java:94: error: '.class' expected
        int number = 0;/** hvor mange brikker ? fjerne/
            ^
Main.java:93: error: not a statement
        int targetPile = 0;/hvilken haug ? velge/
                                                ^
Main.java:94: error: illegal start of expression
        int number = 0;/** hvor mange brikker ? fjerne/
                   ^
Main.java:94: error: ';' expected
        int number = 0;/** hvor mange brikker ? fjerne/
                    ^
Main.java:94: error: unclosed comment
        int number = 0;/** hvor mange brikker ? fjerne/
                       ^
Main.java:114: error: reached end of file while parsing
}
 ^
20 errors

Standard output is empty