import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	}

} Main public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	} main {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	} Scanner input = new Scanner(System.in); input new Scanner(System.in) System.out.println((input.nextInt()+1)/2) System.out.println System.out System System.out (input.nextInt()+1)/2 (input.nextInt()+1) input.nextInt() input.nextInt input 1 2 String[] args args public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	}

} public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner input = new Scanner(System.in);
		System.out.println((input.nextInt()+1)/2);
	}

}
