import java.util.Scanner;

/**
 * Main
 */
public class Main {
  public static void main(String[] args) {
    (new Main()).run();
  }

  public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  }
} import java.util.Scanner; Scanner java.util public class Main {
  public static void main(String[] args) {
    (new Main()).run();
  }

  public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  }
} Main public static void main(String[] args) {
    (new Main()).run();
  } main {
    (new Main()).run();
  } (new Main()).run() (new Main()).run (new Main()) String[] args args public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  } run {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc System.out.println(n / 2 + n % 2) System.out.println System.out System System.out n / 2 + n % 2 n / 2 n 2 n % 2 n 2 public class Main {
  public static void main(String[] args) {
    (new Main()).run();
  }

  public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  }
} public class Main {
  public static void main(String[] args) {
    (new Main()).run();
  }

  public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  }
} Main
import java.util.Scanner;

/**
 * Main
 */
public class Main {
  public static void main(String[] args) {
    (new Main()).run();
  }

  public void run() {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    System.out.println(n / 2 + n % 2);
  }
}