import java.util.Scanner;

public class Main {

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

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

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

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

public class Main {

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