import java.util.Scanner;
public class Main {
  public static void main(String[] args) {
    Scanner scan = new Scanner(System.in);
    int x = scan.nextInt();
    String A = scan.next();
    String B;
    String C;
    String ans = "No";
    int l;
    l = A.length();
    B = A.substring(0, l/2);
    C = A.substring(l/2, l);
    if (B.equals(C)) {
      ans = "Yes";
    }
    System.out.println(ans);
    scan.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