import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	}

	} 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();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	}

	} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	} main {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

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

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	}

	} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	}

	} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int ans = n/2;

		if(n % 2 == 0){
			System.out.println(ans);
		}else{
			System.out.println(ans+1);
		}

	}

	}