import java.util.Scanner;
 
public class Main {
 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	}
	static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 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 = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	}
	static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	}
 
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	} main {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	} Scanner sc = new Scanner(System.in) ; sc new Scanner(System.in) int n = Integer.parseInt(sc.next()); n Integer.parseInt(sc.next()) Integer.parseInt Integer sc.next() sc.next sc System.out.println(calculate(n)) System.out.println System.out System System.out calculate(n) calculate n String[] args args static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	} calculate {
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	} if(n%2 == 0) return n/2; n%2 == 0 n%2 n 2 0 return n/2; n/2 n 2 return (n/2) + 1; (n/2) + 1 (n/2) n 2 1 int n n public class Main {
 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	}
	static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	}
 
} public class Main {
 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	}
	static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	}
 
} Main
import java.util.Scanner;
 
public class Main {
 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in) ;
		int n = Integer.parseInt(sc.next());
		System.out.println(calculate(n));
	}
	static int calculate(int n){
		if(n%2 == 0) return n/2;
		return (n/2) + 1;
	}
 
}