import java.util.*;

public class Main {
  static Scanner sc = new Scanner(System.in);
  public static void main(String[] args) {

    int len = sc.nextInt();
    // sc = new Scanner(System.in);
    String str = sc.next();

    if (len%2 == 1){System.out.println("No");return;}

    // String substr_former = str.substring(0, len/2);
    String substr_later = str.substring((len/2), len);

    if (str.startsWith(substr_later)){
      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