import java.util.*;
public class Main{
	public static void main(String args[]){
		
		Scanner ob = new Scanner(System.in);
		int N = ob.nextInt();
		int R;
		
		if(N % 2 != 0){
			R = (N / 2) + 1;
		}
		else{
			R = N / 2;
		}

		System.out.println(R);	
	}
}

/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