#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define ll long long
#define rep(i, n) for (int i = 0; i < (n); i++)
#define coutf(f) cout << fixed << setprecision(f)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()

int main() {
	int n;
	cin >> n;
	deque<char> deq;
	rep(i, n) {
		int t;
		char s;
		cin >> t >> s;
		if (t == 0) deq.push_back(s);
		else deq.push_front(s);
	}
	while (!deq.empty()) {
		cout << deq.front();
		deq.pop_front();
	}
	cout << endl;
	return 0;
}