import java.util.*;

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

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