#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


int main() {
  int n;
  cin >> n;
  deque<char> d;
  for (int i = 0; i < n; ++i) {
    int t;
    char s;
    cin >> t >> s;
    if (t == 0) d.push_back(s);
    else d.push_front(s);
  }
  for (int i = 0; i < n; ++i) cout << d[i];
  puts("");
  return 0;
}