#include<iostream>
#include<stack>
#include<vector>
using namespace std;
class mod{
    int module;
    int price;
  public:
  mod(int m, int p){
      module = m;
      price = p;
  }
  int getPrice(){
      return price;
  }
};


int main(){
    int n;
    cin>>n;
    stack<mod> s;
    int choice, price;
    vector<int> v;
    for(int i = 0; i < n; i++){
        cin>>choice;
        if(choice == 2){
            cin>>price;
            mod m(choice, price);
            s.push(m);
        }
        else{
           mod buy = s.top();
            v.push_back(buy.getPrice());
            s.pop();

        }
    }
    for(int i = 0; i < v.size(); i++){
        cout<<v[i]<<endl;
    }
}