import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	} main {
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int zenbu = sc.nextInt(); zenbu sc.nextInt() sc.nextInt sc System.out.println((zenbu-(zenbu%2))/2+(zenbu%2)) System.out.println System.out System System.out (zenbu-(zenbu%2))/2+(zenbu%2) (zenbu-(zenbu%2))/2 (zenbu-(zenbu%2)) zenbu (zenbu%2) zenbu 2 2 (zenbu%2) zenbu 2 String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	}
} public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int zenbu = sc.nextInt();
        System.out.println((zenbu-(zenbu%2))/2+(zenbu%2));
	}
}