import java.util.Scanner;

public class Main{
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        String b = sc.next();
        String[] c = b.split("");
        String d = "";
        String e = "";
        if (a != c.length) {
            System.out.println("No");
        } else {
            for (int i = 0; i < a / 2; i++) {
                d += c[i];
            }
            for (int j = a / 2; j <= a - 1; j++) {
                e += c[j];
            }
            if (d.equals(e)) {
                System.out.println("Yes");
            } 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