import java.io.*;

class Result {

public static long strangeCounter(long t) {
    long cycleStart = 1;
    long cycleValue = 3;

    while (t > cycleStart + cycleValue - 1) {
        cycleStart += cycleValue;
        cycleValue *= 2;
    }

    return cycleValue - (t - cycleStart);
}

}

public class Solution { public static void main(String[] args) throws IOException { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));

    long t = Long.parseLong(bufferedReader.readLine().trim());

    long result = Result.strangeCounter(t);

    bufferedWriter.write(String.valueOf(result));
    bufferedWriter.newLine();

    bufferedReader.close();
    bufferedWriter.close();
}

}