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 != 0) {
    	System.out.println("No");
    }else if(S.substring(0,n/2).equals(S.substring(n/2,n))){
		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