import java.util.*;

public class Main {

    static final int MOD=1000000007;


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

    }
}

 import java.util.*; util.* java public class Main {

    static final int MOD=1000000007;


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

    }
} Main static final int MOD=1000000007; MOD 1000000007 public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        if(n%2==1) System.out.println(n/2+1);
        else System.out.println(n/2);

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

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

    static final int MOD=1000000007;


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

    }
} public class Main {

    static final int MOD=1000000007;


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

    }
} Main
import java.util.*;

public class Main {

    static final int MOD=1000000007;


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

    }
}


