import java.util.*;

class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = Integer.parseInt(sc.next());
		
		int count = 0;
		
		if(N % 2 == 0 ){
			System.out.println(N/2);
		
		} else {
			System.out.println(N/2 + 1);
		}
		
	
	
	}

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

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

class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = Integer.parseInt(sc.next());
		
		int count = 0;
		
		if(N % 2 == 0 ){
			System.out.println(N/2);
		
		} else {
			System.out.println(N/2 + 1);
		}
		
	
	
	}

}