import java.io.*;
import java.util.*;

public class GameHelper {
	private static final String alphabet = "abcdefg";
	private int tailleLigne = 7;
	private int tailleGrille = 49;
	private int[] grille = new int[tailleGrille];
	private int nbPtCom = 0;
	
	public String getUserInput(String prompt) {
		String inputLine = null;
		System.out.print(prompt + "  ");
		try{
			BufferedReader is = new BufferedReader(new InputStreamReader(System.in));
			inputLine = is.readLine();
			if (inputLine.length()==0 ) return null;
		}catch (IOException e){
		System.out.println("IOEception: " + e)	;
		}
		return inputLine.toLowerCase();
}

    public ArrayList placePointCom(int taillePtCom){
    	ArrayList cellAlpha = new ArrayList();
    	String [] coordAlpha = new String [taillePtCom];
    	String temp = null;
    	int[] coords = new int[taillePtCom];
    	int essais = 0;
    	boolean succes = false;
    	int place = 0;
    	
    	nbPtCom++;
    	int incr = 1;
    	if((nbPtCom % 2)==1){
    		incr = tailleLigne;
    	}
    	while(!succes & essais++ < 200){
    		place = (int)(Math.random() * tailleGrille);
    		//System.out.println("essayé " + place);
    		int x = 0;
    		succes = true;
    		while (succes && x < taillePtCom){
    			if (grille[place]== 0){
    				coords[x++] = place;
    				place += incr;
    				
    				if(place >= tailleGrille);
    					succes = false;
    			}
    			if(x>0 & (place % tailleLigne ==0)){
    				succes = false;
    			} else {
    				//System.out.println("utilisé " + place);
    				succes = false;
    			}
    		}
    	}
    	
    	int x = 0;
    	int ligne = 0;
    	int colonne = 0;
    	System.out.println("\n");
    	
    	while (x < taillePtCom){
    		grille[coords[x]] = 1;
    		ligne = (int) (coords[x] / tailleLigne);
    		colonne = coords[x] % tailleLigne;
    		temp = String.valueOf(alphabet.charAt(colonne));
    		
    		cellAlpha.add(temp.concat(Integer.toString(ligne)));
    		x++;
    	}
    	System.out.println("\n");
    	
    	return cellAlpha;
    }
}