import java.util.*;

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

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