import java.util.*;
import java.io.*;

public class Main {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	}
} import java.util.*; util.* java import java.io.*; io.* java public class Main {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	}
} Main public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	} main {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) PrintWriter pw = new PrintWriter(System.out); pw new PrintWriter(System.out) StringTokenizer st; st System.out.println((sc.nextInt() + 1) / 2) System.out.println System.out System System.out (sc.nextInt() + 1) / 2 (sc.nextInt() + 1) sc.nextInt() sc.nextInt sc 1 2 String[] args args public class Main {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	}
} public class Main {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	}
} Main
import java.util.*;
import java.io.*;

public class Main {

	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		//BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		PrintWriter pw = new PrintWriter(System.out);
		StringTokenizer st;
		
		
		System.out.println((sc.nextInt() + 1) / 2);
		
	}
}