import java.util.Scanner;

public class Main {
    static int n;
    static int[] a;
    static long[] dp;

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

} import java.util.Scanner; Scanner java.util public class Main {
    static int n;
    static int[] a;
    static long[] dp;

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

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

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

} public class Main {
    static int n;
    static int[] a;
    static long[] dp;

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

} Main
import java.util.Scanner;

public class Main {
    static int n;
    static int[] a;
    static long[] dp;

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

}