import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.Scanner;
import java.util.ArrayList;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    }

    static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.List; List java.util import java.util.Scanner; Scanner java.util import java.util.ArrayList; ArrayList java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    }

    static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) D solver = new D(); solver new D() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    } D public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        } solve {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        } List<Long> H = new ArrayList<>(); H new ArrayList<>() H.add(Long.parseLong(in.next())) H.add H Long.parseLong(in.next()) Long.parseLong Long in.next() in.next in int cnt = 0; cnt 0 long cnt2 = 1; cnt2 1 long ans = 0; ans 0 while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            } true {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            } if (H.get(cnt) == 1) {
                    ans++;
                    break;
                } H.get(cnt) == 1 H.get(cnt) H.get H cnt 1 {
                    ans++;
                    break;
                } ans++ ans break; if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                } H.get(cnt) > 1 H.get(cnt) H.get H cnt 1 {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                } H.add((long) Math.floor(H.get(cnt) / 2)) H.add H (long) Math.floor(H.get(cnt) / 2) Math.floor Math H.get(cnt) / 2 H.get(cnt) H.get H cnt 2 cnt++ cnt ans = ans + cnt2 * 2 ans ans + cnt2 * 2 ans cnt2 * 2 cnt2 2 cnt2 *= 2 cnt2 2 out.println(ans) out.println out ans int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    }

    static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    }

    static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.List;
import java.util.Scanner;
import java.util.ArrayList;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        D solver = new D();
        solver.solve(1, in, out);
        out.close();
    }

    static class D {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            // 入力
            List<Long> H = new ArrayList<>();
            H.add(Long.parseLong(in.next()));
            int cnt = 0;
            long cnt2 = 1;
            long ans = 0;

            while (true) {
                if (H.get(cnt) == 1) {
                    ans++;
                    break;
                }

                if (H.get(cnt) > 1) {
                    H.add((long) Math.floor(H.get(cnt) / 2));
                    cnt++;
                    ans = ans + cnt2 * 2;
                    cnt2 *= 2;
                }
            }


            // 出力
            out.println(ans);

        }

    }
}

