import java.util.*;

public class Main {
    public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		// 入力の取得
      	int r = sc.nextInt();
      	String s = sc.next();
      	String[] p = s.split("");
      	int half = r / 2;
      	boolean flg = true;
      	if (r % 2 == 1) {
      	    System.out.println("No");
      	    return;
      	}
      	for(int i=1; i<=half; i++) {
      	    if (!p[i].equals(p[half+i])) flg = false;
      	}

        if (flg) 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