import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();
        String s = scan.next();
        //System.out.println(s.substring(0,n/2));
        //System.out.println(s.substring(n/2 , n));
        if(s.substring(0,n/2).equals(s.substring(n/2 , n))){
            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