import java.util.*;
class Main {
	public static void main(String[] args) throws Exception {
		final 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);

        sc.close();
    }

}

/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