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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);

    int N; cin >> N;
    vector<int> hold(N,-1);
    int holdb = -1;
    for(int i=0; i<N; i++){
        int a,b; cin >> a >> b;
        if(b == 2) holdb = i;
        else if(a == 1){
            if(b == 1) hold.at(i) = holdb,holdb = -1;
            hold.at(i+1) = i;
        }
        else{
            if(b == 1) hold.at(i) = holdb,holdb = -1;
            int pos = i;
            while(pos != -1){
                cout << pos+1 << "\n";
                pos = hold.at(pos);
            }
        }
    }
}