DecimalToBinary

import java.util.ArrayDeque;
import java.util.Scanner;

public class DecimalToBinary {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int num = Integer.parseInt(sc.nextLine());

        ArrayDeque<Integer> stack = new ArrayDeque<>();
        if(num == 0){
            stack.push(0);
        }
        while (num != 0){
            int remain = num % 2;
            stack.push(remain);
            num /= 2;
        }
        for (int i = stack.size(); i > 0; i--) {
            System.out.print(stack.pop());
        }
    }
}