FinalSampleProb1

import java.util.Scanner;

public class FirstProblemSolution {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int n;
        n = input.nextInt();
        input.nextLine();
        String text;
        text = input.nextLine();
        String sampleOne = text.substring(0, n);
        String sampleTwo = text.substring(text.length() - n, text.length());

        if(sampleOne.equals(sampleTwo)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}