import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    }
  }
} import java.util.*; util.* java class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    }
  }
} Main public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    } n % 2 == 0 n % 2 n 2 0 {
      System.out.println(n / 2);
    } System.out.println(n / 2) System.out.println System.out System System.out n / 2 n 2 {
      System.out.println(n / 2 + 1);
    } System.out.println(n / 2 + 1) System.out.println System.out System System.out n / 2 + 1 n / 2 n 2 1 String[] args args
import java.util.*;

class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    if (n % 2 == 0) {
      System.out.println(n / 2);
    } else {
      System.out.println(n / 2 + 1);
    }
  }
}