import java.util.*;
import java.io.PrintWriter;
public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	}
} import java.util.*; util.* java import java.io.PrintWriter; PrintWriter java.io public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	}
} Main public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	} main {
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int n=sc.nextInt(); n sc.nextInt() sc.nextInt sc System.out.println((n+1)/2) System.out.println System.out System System.out (n+1)/2 (n+1) n 1 2 String[] args args public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	}
} public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	}
} Main
import java.util.*;
import java.io.PrintWriter;
public class Main{
	public static void main(String[] args){
		Scanner sc=new Scanner(System.in);
		int n=sc.nextInt();
		System.out.println((n+1)/2);
	}
}
