import java.io.*;
import java.math.BigInteger;
import java.util.Scanner;

public class Main{
    static Scanner in = new Scanner(System.in);

    static String[] dp = new String[10001];
    static BigInteger A,B,C = new BigInteger("2");
    public static void main(String[] args) {
        A = new BigInteger(in.nextLine());
        B = new BigInteger("0");
        char[] binary = toBinary(A).toCharArray();
        for(int i = 0; i < binary.length; i ++) {
             BigInteger result = new BigInteger(binary[i] + "");
             result = result.multiply(new BigInteger(BinaryNumber(i + 1)));
             B = B.add(result);
        }
        System.out.println(B.toString());
    }
    static String BinaryNumber(int i) {//dp优化
        if(i == 1) {
            dp[i] = "1";
            return "1";
        } else {
            dp[i] = new BigInteger(dp[i - 1]).multiply(new BigInteger("2")).toString();
            return dp[i];
        }   
    }
    static String toBinary(BigInteger A) {
        StringBuilder binary = new StringBuilder();
        while(A.toString().length() > 1 || !A.toString().equals("0")) {
            binary.append(A.divideAndRemainder(C)[1]);
            A = A.divide(C);
        }
        return binary.reverse().toString();//反转加转换为字符串
    }
}