using static System.Console;

using System.Numerics;

public class Program {

    public static void Main() {

        WriteLine(DecimalParaBinario(BigInteger.Parse("1231231231231231231231231232312312312")));

    }

    static string DecimalParaBinario(BigInteger n) {

        BigInteger resto;

        var result = "";

        while (n > 0) {

            resto = n % 2;

            n /= 2;

            result = resto.ToString() + result;

        }

        return result.ToString();

    }

}