import java.util.Scanner;
public class Main {

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

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

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

		scan.close();
	}
} Main public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

		scan.close();
	} main {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

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

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

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

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

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

	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);

		int page = scan.nextInt();

		System.out.println((page+1)/2);

		scan.close();
	}
}
