import java.util.*;

public class Main {
 public static void main(String[] args) {
  
    Scanner sc = new Scanner(System.in);
     
    int a = sc.nextInt();
    

     int sum = 0;
     sum = a / 2;
      if(a % 2 == 0) {
         System.out.print(a / 2); 
} else {
           sum = a / 2;
System.out.print(sum + 1); 
}

      

}

}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz