#include <iostream>
#include <queue>
using namespace std;

int main() {
    queue<char> q;
    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        char x;
        cin >> x;
        q.push(x);
    }

    while (!q.empty()) {
        char a = q.front();
        q.push(a);
        cout << a;
        q.pop();
        q.pop();
    }

    return 0;
}