#include<bits/stdc++.h>
using namespace std;
int main()
{
int n;
  cin>>n;
  string s;
  cin>>s;
  if(n%2!=0)
  {cout<<"No";
   return 0;}
  for(int i=0;i<n/2;i++)
  {
  if(s[i]!=s[n/2+i])
  {cout<<"No";
   return 0;
  } }cout<<"Yes";}