
import java.util.Scanner;

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

        if (n%2 != 0) {
            System.out.println("No");
            return;
        }
        
        int half = n / 2;
        String t1 = s.substring(0, half);
        String t2 = s.substring(half, n);
        
        if(t1.equals(t2)){
            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