import java.util.Scanner;

public class Main {

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

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

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

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		scan.close();
		System.out.println((n%2==0)? n/2:n/2+1);
	}
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		scan.close();
		System.out.println((n%2==0)? n/2:n/2+1);
	}
}
