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 if (s.length() % 2 == 1){
			System.out.println("No");
		} else {
			int mojisuHalf = n/2;
			String mojiLeft = s.substring(0,mojisuHalf);
			String mojiRight = s.substring(mojisuHalf);
			if (mojiLeft.equals(mojiRight)) {
				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