
import java.util.*;
import java.lang.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) {
        //コード
        Scanner scanner = new Scanner(System.in);
        Integer x = Integer.parseInt(scanner.next());
        String[] s = scanner.next().split("");

        int half =  x / 2;
        if (x % 2 != 0) {
            System.out.println("No");
            System.exit(0);
        }
        boolean flag = true;
        for(int i = 0; i < half; i++) {
            if(!(s[i].equals(s[half+i]))) {
                flag = false;
                break;
            }
        }

        if (flag && half != 0) {
            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