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 == 1)
			System.out.println("No");
		else{
			String firstHalf = s.substring(0,n/2);
			String secondHalf = s.substring(n-(n/2));
			if(firstHalf.equals(secondHalf))
				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