import java.util.Scanner;

public class Main {

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

	}

} Main public static void main(String[] args) {
		Scanner scan=new Scanner(System.in);
		int N=scan.nextInt();
		if(N%2==0)
		{
		System.out.println(N/2);
		}
		else
		{
			System.out.println((N/2)+1);
		}

	} main {
		Scanner scan=new Scanner(System.in);
		int N=scan.nextInt();
		if(N%2==0)
		{
		System.out.println(N/2);
		}
		else
		{
			System.out.println((N/2)+1);
		}

	} Scanner scan=new Scanner(System.in); scan new Scanner(System.in) int N=scan.nextInt(); N scan.nextInt() scan.nextInt scan if(N%2==0)
		{
		System.out.println(N/2);
		}
		else
		{
			System.out.println((N/2)+1);
		} N%2==0 N%2 N 2 0 {
		System.out.println(N/2);
		} System.out.println(N/2) System.out.println System.out System System.out N/2 N 2 {
			System.out.println((N/2)+1);
		} System.out.println((N/2)+1) System.out.println System.out System System.out (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();
		if(N%2==0)
		{
		System.out.println(N/2);
		}
		else
		{
			System.out.println((N/2)+1);
		}

	}

} public class Main {

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

	}

}