import java.util.Scanner;
public class Main{
 public static void main(String[] args) {
   double n=0;
   Scanner sc = new Scanner(System.in);
   n=sc.nextInt();
   double x;
   if(n%2==0){
     x=n/2;
   }else{
     x=n/2+0.5;
   }
   int y=(int)x;
   System.out.println(y);
 }
}

/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