/*


      _             _    ___     ___    _  __       __
   __| |   __ _    / |  / _ \   / _ \  (_)/ /    _  \ \
  / _` |  / _` |   | | | | | | | | | |   / /    (_)  | |
 | (_| | | (_| |   | | | |_| | | |_| |  / /_     _   | |
  \__,_|  \__,_|   |_|  \___/   \___/  /_/(_)   (_)  | |
                                                    /_/


 */

//#include <iostream>
#include <queue>
#include <stack>
#include <map>
#include <cstdio>
#include <cmath>
#include <cstring>
#include <set>
#include <algorithm>
#include <bitset>
#include <time.h>
#include <tuple>
#include <fstream>
#include <iomanip>
#include <utility>
#include <ext/pb_ds/assoc_container.hpp>

#pragma warning "da 100% din tine. :)"
#define nl '\n'
#define cnl cout << '\n';
#define pb(x) push_back(x)
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define ll long long
#define ull unsigned ll
#ifdef INFOARENA
#define ProblemName "heapuri"
#endif
#define MCONCAT(A, B) A B
#ifdef ProblemName
#define InFile MCONCAT(ProblemName, ".in")
#define OuFile MCONCAT(ProblemName, ".out")
#else
#define InFile "a.in"
#define OuFile "a.out"
#endif


using namespace __gnu_pbds;
using namespace std;
ifstream cin(InFile);
ofstream cout(OuFile);


typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;

template<class v, class type>
void print(v Vector, type nr) {
    for_each(all(Vector), [](type x) {
        cout << x << ' ';
    });
}

multiset<int> setum;
int order[100001];
int k = 1;

int main() {
//    freopen(InFile, "r", stdin);
//    freopen(OuFile, "w", stdin);
    ios_base::sync_with_stdio(false);
    clock_t tStart = clock();
    int n, q, val;
    cin >> n;
    while (n--) {
        cin >> q;
        if (q == 3)
            cout << *setum.begin() << nl;
        else {
            cin >> val;
            if (q == 1) {
                setum.insert(val);
                order[k++] = val;
            } else
                setum.erase(setum.find(order[val]));
        }
    }
    printf("\nTime taken: %.2fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
}