import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        Integer lenChara = Integer.valueOf(scan.nextLine());
        String targetChara = scan.nextLine();

        if (lenChara % 2 == 0) {
            int divide = lenChara / 2;
            String start = targetChara.substring(0, divide);
            String end = targetChara.substring(divide, targetChara.length());
            if (start.equals(end)) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        } else {
            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