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