import java.util.Scanner;

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