import java.util.*;

public class Main
{
	public static void main(String Args[])
	{
		int a;
		Scanner s1=new Scanner(System.in);
		a=s1.nextInt();
		if(a%2==0)
		{
			System.out.println(a/2);
		}
		else
		{
				System.out.println(a/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