#include <bits/stdc++.h>
using namespace std;
ifstream fin("heapuri.in");
ofstream fout("heapuri.out");

static const int MAXQ = 200000 + 5;

int h[MAXQ];        // heap: stocheaza id-uri
int posi[MAXQ];     // posi[id] = pozitia id-ului in heap
int val[MAXQ];      // val[id] = valoarea inserata

int sz = 0;         // dimensiunea heap-ului
int idCnt = 0;      // cate inserari am facut (id curent)

inline bool cmpId(int id1, int id2) {
    return val[id1] < val[id2];
}

inline void swapHeap(int a, int b) {
    int ida = h[a], idb = h[b];
    h[a] = idb; h[b] = ida;
    posi[ida] = b;
    posi[idb] = a;
}

void siftUp(int i) {
    while (i > 1) {
        int p = i / 2;
        if (cmpId(h[i], h[p])) {
            swapHeap(i, p);
            i = p;
        } else break;
    }
}

void siftDown(int i) {
    while (true) {
        int l = i * 2;
        int r = l + 1;
        int best = i;

        if (l <= sz && cmpId(h[l], h[best])) best = l;
        if (r <= sz && cmpId(h[r], h[best])) best = r;

        if (best != i) {
            swapHeap(i, best);
            i = best;
        } else break;
    }
}

void heapPush(int x) {
    ++idCnt;
    val[idCnt] = x;

    h[++sz] = idCnt;
    posi[idCnt] = sz;
    siftUp(sz);
}

void heapEraseById(int id) {
    int i = posi[id];          // pozitia in heap
    swapHeap(i, sz);
    posi[id] = 0;              // optional: marcam sters
    --sz;

    if (i <= sz) {
        // dupa swap, elementul de pe pozitia i poate trebui urcat sau coborat
        siftUp(i);
        siftDown(i);
    }
}

int heapMin() {
    return val[h[1]];
}

int main() {
    ios::sync_with_stdio(false);
    fin.tie(nullptr);

    freopen("heapuri.in", "r", stdin);
    freopen("heapuri.out", "w", stdout);

    int q;
    cin >> q;
    while (q--) {
        int t;
        fin >> t;
        if (t == 1) {
            int x; fin >> x;
            heapPush(x);
        } else if (t == 2) {
            int k; fin >> k;
            heapEraseById(k);
        } else { // t == 3
            fout << heapMin() << "\n";
        }
    }
    return 0;
}