package com.company;

import java.util.Scanner;

/*
Amon Guinan

Friday, January 25.
Program detects whether emails have a single "@" or not.
 */
public class exercises {
    public static void main(String [] args)
    {
        int num;

        System.out.println("Enter a number in base 10.");
        Scanner input = new Scanner(System.in);
        num = input.nextInt();
        int binary[] = new int[30];//[number] represents maximum array length.
        int index = 0;
        while(num > 0){
            binary[index++] = num%2;
            num = num/2;
        }
        for(int i = index-1;i >= 0;i--){
            System.out.print(binary[i]);
        }
    }

    }