import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		String s = sc.next();
		char[] S = s.toCharArray();
		boolean key = true;
		if (N%2 == 0) {
			for (int i = 0; i < S.length/2; i++) {
				if (S[i] != S[S.length/2+i]) {
					key = false;
				}
			}
		} else {
			key = false;
		}
		System.out.println(key? "Yes" : "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