#include <bits/stdc++.h>
using namespace std;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
using Int = long long;
const char newl = '\n';

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);

  Int n;
  cin>>n;

  deque<char> ds;
  for(Int i=0;i<n;i++){
    Int t;
    char c;
    cin>>t>>c;
    if(t==0) ds.emplace_back(c);
    if(t==1) ds.emplace_front(c);
  }

  for(char c:ds) cout<<c;
  cout<<newl;
  return 0;
}