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