import java.util.Scanner;

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

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