import java.util.Objects;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scn = new Scanner(System.in);
        int n = scn.nextInt();
        String str = scn.next();
        if(n % 2 != 0){
            System.out.println("No");
        }else{
            int half = n/2;
            if(Objects.equals(str.substring(0, half),str.substring(half))){
                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