import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  }
} import java.util.Scanner; Scanner java.util public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  } main {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc if (N % 2 == 1) N++; N % 2 == 1 N % 2 N 2 1 N++ N System.out.println(N / 2) System.out.println System.out System System.out N / 2 N 2 sc.close() sc.close sc String[] args args public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  }
} public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  }
} Main
import java.util.Scanner;

public class Main {

  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    if (N % 2 == 1) N++;

    System.out.println(N / 2);

    sc.close();
  }
}