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();

		if(n %2 == 0) {
			// sを2で割って０~M     M+1~N比較
			if(s.substring(0, n/2).equals(s.substring(n/2, s.length()))){
				System.out.println("Yes");
			}else {
				System.out.println("No");
			}
		}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