#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    int N;
    cin >> N;

    deque<char> dq;

    rep(i, 0, N){
        int T; char S;
        cin >> T >> S;

        if(T == 0) dq.push_back(S);
        else dq.push_front(S);
    }

    for(char &c : dq) cout << c;
    cout << endl;

    return 0;
}