import java.util.Scanner;
public class Main{
	public static void main(String args[]) {
		Scanner sc=new Scanner(System.in);
		int p=sc.nextInt();
		String c=sc.next();
		char a[]=c.toCharArray();
		int b=0;
		for(int i=0;i<p/2;i++) {
				if(a[i]!=a[i+p/2])
					b++;
		}
		if(p%2==0){
			if(b==0) {
			System.out.print("Yes");	
			}else {
			System.out.print("No");
			}
		}else
			System.out.print("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