import java.util.*;
import java.io.*;

class Main{
  public static void main(String args[])throws IOException{
    try(BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
      String input_num = br.readLine();
      int num = Integer.parseInt(input_num);
      String input_s = br.readLine(); 
      if((num % 2) == 0){
        int half = num / 2;
        if(input_s.substring(0, half).equals(input_s.substring(half, num))){
          System.out.println("Yes");
        }else{
          System.out.println("No");
        }
      }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