#include <iostream>
#include <sstream>
#include <string>
#include <vector>
using namespace std;
//Temir Askhat
#define ll long long
#define ull unsigned long long
#define pb push_back
#define sz size()
#define sqr(x) ((x) * (x))
#define mp make_pair
#define F first
#define S second
#define all(c) c.begin(), c.end()
#define rall(c) c.rbegin(), c.rend()
#define tr(container, it) \
 for(typeof(container.begin()) it = container.begin(); it != container.end(); it++)
#define present(container, element) (container.find(element) != container.end()) // set, map
#define cpresent(container, element) (find(all(container), element) != container.end())\


vector<int> prefix(string str)  {
    int n = str.size();
    vector<int> p(n);
    int j = 0;
    for(int i = 1; i < n; i++) {
        while(j > 0 && str[i] != str[j])
            j = p[j - 1];
        if(str[i] == str[j]) j++;
        p[i] = j;
    }
    return p;
}

int main() {
    #ifndef ONLINE_JUDGE
     freopen("in", "r", stdin); freopen("out", "w", stdout);
    #endif
    int n;
    cin >> n;
    string s, t;
    cin >> s >> t;
    string cur = s + t;
    vector<int> v = prefix(cur);
    while(v[v.sz - 1] != 0) {
        if(v[v.sz - 1] == 0) {
            cout << "NO";
            return 0;
        }
        int end = v[v.sz - 1];
        cur.erase(0, end);
        string current = "";
        //cout << endl;
        for (int i = 0; i < cur.sz - end ; ++i) {
            current += cur[i];
        }
        //cout << "current " << current << endl;
        cur = current;
    //    cout << "cur " << cur << endl;
        if(cur.sz == 0) {
            cout << "YES";
            return 0;
        }
        v = prefix(cur);
    }
    cout << "NO";
    return 0;
}