import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        if (a % 2 == 1){
            a = a + 1;
        }

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

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

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

        int b = a/2;
            
        System.out.println(b);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc if (a % 2 == 1){
            a = a + 1;
        } a % 2 == 1 a % 2 a 2 1 {
            a = a + 1;
        } a = a + 1 a a + 1 a 1 int b = a/2; b a/2 a 2 System.out.println(b) System.out.println System.out System System.out b String[] args args
import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        if (a % 2 == 1){
            a = a + 1;
        }

        int b = a/2;
            
        System.out.println(b);
    }
}