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

public class Main{
	public static void main(String[] args) throws IOException {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	}
} 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 {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	}
} Main public static void main(String[] args) throws IOException {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	} main {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	} try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		} {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		} BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in)) BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in)) new BufferedReader(
				new InputStreamReader(System.in)) String in = br.readLine(); in br.readLine() br.readLine br String chr[] = in.split(" "); chr in.split(" ") in.split in " " int n = Integer.parseInt(chr[0]); n Integer.parseInt(chr[0]) Integer.parseInt Integer chr[0] chr 0 System.out.println(n%2 == 0 ? n/2 : (n+1)/2) System.out.println System.out System System.out n%2 == 0 ? n/2 : (n+1)/2 n%2 == 0 n%2 n 2 0 n/2 n 2 (n+1)/2 (n+1) n 1 2 String[] args args public class Main{
	public static void main(String[] args) throws IOException {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	}
} public class Main{
	public static void main(String[] args) throws IOException {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	}
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
	public static void main(String[] args) throws IOException {
		try (BufferedReader br = new BufferedReader(
				new InputStreamReader(System.in))) {

			String in = br.readLine();
			String chr[] = in.split(" ");
			int n = Integer.parseInt(chr[0]);
			 System.out.println(n%2 == 0 ? n/2 : (n+1)/2);
		}
	}
}