import java.util.*;

public class Main {
    public static void main(String args[]) throws Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String args[]) throws Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    }
} Main public static void main(String args[]) throws Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    } main {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) 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 Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    }
} public class Main {
    public static void main(String args[]) throws Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String args[]) throws Exception {
        Scanner sc = new Scanner(System.in);

        System.out.println((sc.nextInt() + 1) / 2);
    }
}
