import java.util.Scanner;

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

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