import java.util.Scanner;
public class Main {
		
		static void solve() {
			Scanner sc = new Scanner(System.in);
			int n = sc.nextInt();
			int res = 0;
			String s = sc.next();
			if(n%2!=0)
				System.out.println("No");
			else {
			for(int i = 0; i<n/2;i++) {
				if(s.charAt(i)!=s.charAt(n/2+i)) {
					res++;
				}
			}
			if(res==0) {
				System.out.println("Yes");
			}
			else
				System.out.println("No");
			
			sc.close();
		}
	}
	public static void main(String[] args) {
		solve();

	}

}
/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