
import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    }
} import java.io.*; io.* java import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    }
} Main public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    } main {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    } Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int n = scan.nextInt(); n scan.nextInt() scan.nextInt scan 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 System.out System System.out n / 2 n 2 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 {
    public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    }
} public class Main {
    public static void main(String[] args) throws IOException {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        if (n % 2 == 0)
            System.out.println(n / 2);
        else
            System.out.println(n / 2 + 1);
    }
} Main

import java.io.*;
import java.util.*;

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