import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	}

} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	}

} Main public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	} main {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	} BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) int N = Integer.parseInt(br.readLine()); N Integer.parseInt(br.readLine()) Integer.parseInt Integer br.readLine() br.readLine br 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 System.out System System.out N / 2 N 2 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 public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	}

} public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	}

} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		int N = Integer.parseInt(br.readLine());
		
		if(N%2 == 0)
			System.out.println(N / 2);
		else
			System.out.println(N / 2 + 1);
	}

}