
import java.util.Scanner;

 class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n=in.nextInt();
        String str=in.next();
        if(n%2!=0)
            System.out.println("No");
        else{
            int i=0,j=n/2;
            boolean flag=false;
            for(;i<j && j<n;i++,j++){
                if(str.charAt(i)!=str.charAt(j)){
                    flag=true;
                    break;
                }
            }
            if(flag)
                System.out.println("No");
            else
                System.out.println("Yes");
        }
    }
}

/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