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

public class Main {
    static PrintWriter out = new PrintWriter(System.out);
    static Scanner sc = new Scanner(System.in);
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int maxn;
    long[] frac,inv;
    long mod = 1000000000+7;
    public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    }
    long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    }
}
 import java.io.*; io.* java import java.util.*; util.* java public class Main {
    static PrintWriter out = new PrintWriter(System.out);
    static Scanner sc = new Scanner(System.in);
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int maxn;
    long[] frac,inv;
    long mod = 1000000000+7;
    public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    }
    long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    }
} Main static PrintWriter out = new PrintWriter(System.out); out new PrintWriter(System.out) static Scanner sc = new Scanner(System.in); sc new Scanner(System.in) static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); reader new BufferedReader(new InputStreamReader(System.in)) int maxn; maxn long[] frac frac inv; inv long mod = 1000000000+7; mod 1000000000+7 1000000000 7 public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    } main {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    } Main main = new Main(); main new Main() System.out.println(main.solve()) System.out.println System.out System System.out main.solve() main.solve main String[] args args long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    } solve {
        int n = sc.nextInt();
        return (n+1)/2;
    } int n = sc.nextInt(); n sc.nextInt() sc.nextInt sc return (n+1)/2; (n+1)/2 (n+1) n 1 2 public class Main {
    static PrintWriter out = new PrintWriter(System.out);
    static Scanner sc = new Scanner(System.in);
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int maxn;
    long[] frac,inv;
    long mod = 1000000000+7;
    public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    }
    long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    }
} public class Main {
    static PrintWriter out = new PrintWriter(System.out);
    static Scanner sc = new Scanner(System.in);
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int maxn;
    long[] frac,inv;
    long mod = 1000000000+7;
    public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    }
    long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    }
} Main
import java.io.*;
import java.util.*;

public class Main {
    static PrintWriter out = new PrintWriter(System.out);
    static Scanner sc = new Scanner(System.in);
    static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int maxn;
    long[] frac,inv;
    long mod = 1000000000+7;
    public static void main(String[] args) throws IOException {
        Main main = new Main();
//        main.solve();
        System.out.println(main.solve());
    }
    long solve() throws IOException {
        int n = sc.nextInt();
        return (n+1)/2;
    }
}

