import java.util.Scanner;
import java.util.Arrays;

class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    String s = sc.next();
    char[] c = s.toCharArray();
    String Before = "";
    String After = "";
    
    for(int i=0; i<n/2; i++){
      Before += c[i];
    }
    
    for(int j=n/2; j<n; j++){
      After += c[j];
    }
    
    if(Before.equals(After)){
      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