import java.util.*;

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

        int n = Integer.parseInt(sc.next());
        String str = sc.next();

        

        if(n % 2 == 1) {
            System.out.println("No");
            return;
        }
        else {
            String s_1 = str.substring(0, n/2);
            String s_2 = str.substring(n/2, n);

            //System.out.println(s_1);
            //System.out.println(s_2);
            if(s_1.equals(s_2)) 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