import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int textSize = sc.nextInt();
        String text = sc.next();
        if (textSize % 2 == 0) {
            String first = text.substring(0, textSize / 2);
            String second = text.substring(textSize / 2);
            if (first.equals(second)) {
                System.out.println("Yes");
                return;
            }
        }
        System.out.println("No");
    }
}

/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