import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    } main {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc System.out.print(n%2==0 ? n/2 : n/2+1) System.out.print System.out System System.out n%2==0 ? n/2 : n/2+1 n%2==0 n%2 n 2 0 n/2 n 2 n/2+1 n/2 n 2 1 String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        System.out.print(n%2==0 ? n/2 : n/2+1);
    }
}
