                    ////////////////////////////////////////////////////
                    //                                                //
                    //  For her who keeps the fire kindling in me...  //
                    //                                                //
                    ////////////////////////////////////////////////////

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
// import java.util.Scanner;
// import java.util.Arrays;
// import java.util.ArrayList;
// import java.util.Collections; 
// import java.util.StringTokenizer;
import java.util.*;
import java.lang.Math;
import java.awt.Point;

import java.awt.geom.*;

public class Main {

    public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

// ========================================### FAST IO ###=========================================//
class FastReader {
    BufferedReader br;
    StringTokenizer st;

    public FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    Double nextDouble() {
        return Double.parseDouble(next());
    }

    String nextLine() {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }
}
// ====================================================================================================// import java.io.BufferedReader; BufferedReader java.io import java.io.BufferedWriter; BufferedWriter java.io import java.io.FileOutputStream; FileOutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.io.OutputStream; OutputStream java.io import java.io.OutputStreamWriter; OutputStreamWriter java.io import java.io.PrintWriter; PrintWriter java.io import java.util.*; util.* java import java.lang.Math; Math java.lang import java.awt.Point; Point java.awt import java.awt.geom.*; geom.* java.awt public class Main {

    public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
} Main public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    } main {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    } try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        } Exception e {
            e.printStackTrace();
        } e.printStackTrace() e.printStackTrace e {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } FastReader s = new FastReader(); s new FastReader() BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out)); w new BufferedWriter(new OutputStreamWriter(System.out)) int i i j; j long m m n n sum sum t t max max k k h h x x y y min min correct_ans correct_ans vert vert num num size size local_ans local_ans global_ans; global_ans long a a b; b h = s.nextLong() h s.nextLong() s.nextLong s h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1) h (long)((Math.log((double)(h))/Math.log((double)2)) + 1) (Math.log((double)(h))/Math.log((double)2)) Math.log((double)(h)) Math.log Math (double)(h) Math.log((double)2) Math.log Math (double)2 1 w.write((((long)Math.pow(2, h)) -1 )+"\n") w.write w (((long)Math.pow(2, h)) -1 )+"\n" (((long)Math.pow(2, h)) -1 ) ((long)Math.pow(2, h)) Math.pow Math 2 h 1 "\n" w.close() w.close w String args[] args class FastReader {
    BufferedReader br;
    StringTokenizer st;

    public FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    Double nextDouble() {
        return Double.parseDouble(next());
    }

    String nextLine() {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }
} FastReader BufferedReader br; br StringTokenizer st; st public FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    } FastReader {
        br = new BufferedReader(new InputStreamReader(System.in));
    } br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    } next {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    } while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        } st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        } try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } IOException e {
                e.printStackTrace();
            } e.printStackTrace() e.printStackTrace e {
                st = new StringTokenizer(br.readLine());
            } st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
        return Integer.parseInt(next());
    } nextInt {
        return Integer.parseInt(next());
    } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong() {
        return Long.parseLong(next());
    } nextLong {
        return Long.parseLong(next());
    } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next Double nextDouble() {
        return Double.parseDouble(next());
    } nextDouble {
        return Double.parseDouble(next());
    } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    } nextLine {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    } String str = ""; str "" try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } IOException e {
            e.printStackTrace();
        } e.printStackTrace() e.printStackTrace e {
            str = br.readLine();
        } str = br.readLine() str br.readLine() br.readLine br return str; str public class Main {

    public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
} public class Main {

    public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
} Main
                    ////////////////////////////////////////////////////
                    //                                                //
                    //  For her who keeps the fire kindling in me...  //
                    //                                                //
                    ////////////////////////////////////////////////////

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
// import java.util.Scanner;
// import java.util.Arrays;
// import java.util.ArrayList;
// import java.util.Collections; 
// import java.util.StringTokenizer;
import java.util.*;
import java.lang.Math;
import java.awt.Point;

import java.awt.geom.*;

public class Main {

    public static void main(String args[]) {
        try {
            FastReader s = new FastReader();
            BufferedWriter w = new BufferedWriter(new OutputStreamWriter(System.out));
            int i, j;
            long m, n, sum, t, max, k, h, x, y, min, correct_ans, vert, num, size, local_ans, global_ans;
            long a, b;


            // n = s.nextInt();
            // m = s.nextInt();
            
            h = s.nextLong();

            h = (long)((Math.log((double)(h))/Math.log((double)2)) + 1);
            
           // w.write(h+"\n");

            w.write((((long)Math.pow(2, h)) -1 )+"\n");
            w.close();


        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

// ========================================### FAST IO ###=========================================//
class FastReader {
    BufferedReader br;
    StringTokenizer st;

    public FastReader() {
        br = new BufferedReader(new InputStreamReader(System.in));
    }

    String next() {
        while (st == null || !st.hasMoreElements()) {
            try {
                st = new StringTokenizer(br.readLine());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return st.nextToken();
    }

    int nextInt() {
        return Integer.parseInt(next());
    }

    long nextLong() {
        return Long.parseLong(next());
    }

    Double nextDouble() {
        return Double.parseDouble(next());
    }

    String nextLine() {
        String str = "";
        try {
            str = br.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return str;
    }
}
// ====================================================================================================//