import java.util.Scanner;

public class Main{
public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


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


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
}
} Main public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
} main {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) System.err.print("N") System.err.print System.err System System.err "N" int N = scanner.nextInt(); N scanner.nextInt() scanner.nextInt scanner if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  } 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 == 1){
  System.out.println(N/2 + 1);
  } N%2 == 1 N%2 N 2 1 {
  System.out.println(N/2 + 1);
  } 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) {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
}
} public class Main{
public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
}
} Main
import java.util.Scanner;

public class Main{
public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.err.print("N");
  int N = scanner.nextInt();


  if(N%2 == 0){
  System.out.println(N/2);
  }
  else if(N%2 == 1){
  System.out.println(N/2 + 1);
  }
}
}
