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