    import java.util.*;
	import java.lang.Math;
    public class Main
	{
		public static void main(String args[])
		{
			Scanner scan=new Scanner(System.in);
			int n = scan.nextInt();
			if(n%2==0)
				System.out.println(n/2);
			else
				System.out.println((n+1)/2);
		}
	}
	
/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