import java.util.Scanner;

public class Main {
    private String type;
    private String output;
    private int number;

    public Main(String type) {
        this.type = type;

    }
    public void readNum() {
        Scanner num = new Scanner(System.in);
        System.out.println("podaj liczbe");
        this.number = num.nextInt();
    }

    public void convert() {
        if(type.equals("1"))
            decToBin();
        else if(type.equals("2"))
            decToOct();
        else if(type.equals("3"))
            decToHex();
    }

    public void decToBin() {
        int x;
        int num = this.number;
        String storage="";
        char dig[]={'0','1'};
        while(num>0)
        {
            x=num%2;
            storage=dig[x]+storage;
            num=num/2;
        }
        this.output = storage;
    }

    public void decToOct() {
        int x;
        int num = this.number;
        String storage="";
        char dig[]={'0','1','2','3','4','5','6','7'};
        while(num>0)
        {
            x=num%8;
            storage=dig[x]+storage;
            num=num/8;
        }
        this.output = storage;
    }

    public void decToHex() {
        int x;
        System.out.print("Geben Sie Ihre Dezimalzahl ein: ");
        int num = this.number;
        String storage="";
        char dig[]={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
        while(num>0)
        {
            x = num%16;
            storage = dig[x]+storage;
            num = num/16;
        }
        this.output = storage;
    }

    public void resultOut() {
        System.out.println(this.output);
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String result = "";
        System.out.println("Geben Sie 1 ein, um den Dez zu Bin Programm aufzurufen, 2 um den Dez zu Oktal oder 3 um den Dez zu Hexa aufzurufen");
        result = in.nextLine();
        Main rs = new Main(result);
        rs.readNum();
        rs.convert();
        rs.resultOut();
    }

}