import java.util.Scanner;
import java.lang.Math; 


class Main
{
  public static void main(String[] args)
  {
	Scanner input= new Scanner(System.in);
    int n= input.nextInt();
    
    if(n%2==0)
        System.out.print(n/2);
    else
        System.out.print(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