import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println((int) Math.ceil(N / 2.0));
		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();
		System.out.println((int) Math.ceil(N / 2.0));
		sc.close();
	}

} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println((int) Math.ceil(N / 2.0));
		sc.close();
	} main {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println((int) Math.ceil(N / 2.0));
		sc.close();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int N = sc.nextInt(); N sc.nextInt() sc.nextInt sc System.out.println((int) Math.ceil(N / 2.0)) System.out.println System.out System System.out (int) Math.ceil(N / 2.0) Math.ceil Math N / 2.0 N 2.0 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();
		System.out.println((int) Math.ceil(N / 2.0));
		sc.close();
	}

} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		System.out.println((int) Math.ceil(N / 2.0));
		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();
		System.out.println((int) Math.ceil(N / 2.0));
		sc.close();
	}

}
