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

/**
 * 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);
        abc157_a solver = new abc157_a();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

    }
}
 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.Scanner; Scanner 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);
        abc157_a solver = new abc157_a();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

    }
} 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);
        abc157_a solver = new abc157_a();
        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);
        abc157_a solver = new abc157_a();
        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) abc157_a solver = new abc157_a(); solver new abc157_a() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

    } abc157_a public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        } solve {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        } int N = in.nextInt(); N in.nextInt() in.nextInt in if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            } Math.floorMod(N, 2) != 0 Math.floorMod(N, 2) Math.floorMod Math N 2 0 {
                out.println(((int) (N / 2)) + 1);

            } out.println(((int) (N / 2)) + 1) out.println out ((int) (N / 2)) + 1 ((int) (N / 2)) N 2 1 {
                out.println((int) (N / 2));
            } out.println((int) (N / 2)) out.println out (int) (N / 2) N 2 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);
        abc157_a solver = new abc157_a();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

    }
} 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);
        abc157_a solver = new abc157_a();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

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

/**
 * 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);
        abc157_a solver = new abc157_a();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc157_a {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            int N = in.nextInt();

            if (Math.floorMod(N, 2) != 0) {
                out.println(((int) (N / 2)) + 1);

            } else {
                out.println((int) (N / 2));
            }
        }

    }
}

