import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        // B - Echo

        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        
        String s = sc.next();

        String s1 = s.substring(0, n / 2);
        String s2 = s.substring(n / 2, n);
        
        String ans = (n % 2 == 0 && s1.equals(s2) ? "Yes" : "No");
        
        System.out.println(ans);
    }

}
/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