#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    deque<char> s;
    for (int i = 0; i < n; ++i) {
        int t;
        char c;
        cin >> t >> c;
        if (t == 0) s.push_back(c);
        else s.push_front(c);
    }

    for (char c : s) {
        cout << c;
    }
    cout << "\n";
    return 0;
}