
import java.util.Scanner;


public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //System.out.print("入力してください > ");
        int    n = Integer.parseInt(scanner.nextLine());
        String s = scanner.nextLine();
        
        if(n % 2 == 1 || n == 0){
            System.out.println("No");
            return;
        }
        String s1 = s.substring(0  , n/2);
        String s2 = s.substring(n/2, n);
        
        if(s1.startsWith(s2)){
            System.out.println("Yes");
        }
        else{
            System.out.println("No");
        }
        
        // Scannerクラスのインスタンスをクローズ
        scanner.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