import java.util.Scanner;
public class Main {

    public static void main(String[] args) {
        int n;
        try (Scanner sc = new Scanner(System.in)) {
            n = sc.nextInt();
        }
        int a=n/2;
        int b=n%2;
        
        if(b==0)
            System.out.println(a);
        else
            System.out.println(a+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