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