import java.util.Scanner;

class Main {
    public static void main(String args[]) {
        Scanner stdIn = new Scanner(System.in);
        int N = stdIn.nextInt();
        String S = stdIn.next();
        String answer = "Yes";

        if (N % 2 != 0) {
            System.out.println("No");
            System.exit(0);
        }

        for (int i = 0; i < N / 2; i++) {
            if (S.charAt(i) != S.charAt(N / 2 + i)) {
                System.out.println("No");
                System.exit(0);
            }
        }

        System.out.println(answer);
    }
}
/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