import java.util.*;

class Main {
	public static void main(String args[]) {
	    Scanner sc = new Scanner(System.in);
	    int N = sc.nextInt();
	    String S = sc.next();
	    String F = S.substring(0,N/2);
	    String L = S.substring(N/2);
	    
		if (N%2 == 1 || !F.equals(L)) {
	    	System.out.println("No");
		} else {
	    	System.out.println("Yes");
	    }
	}
}

/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