#include <iostream>
#include <fstream>

#define ll long long
#define ull unsigned long long
#define pb push_back
using namespace std;
ifstream in("heapuri.in");
ofstream out("heapuri.out");

const int NMax = 2e5 + 5;
const int sqMax = 320 + 5;

int N,M,nrInsert;
int pos[NMax];

struct elem {
    int val,idx;
    elem(int _val = 0,int _idx = 0) {
        val = _val;
        idx = _idx;
    }
}heap[NMax];

void sift(int);
void percolate(int);
void swap_heap(int,int);

int main() {
    in>>M;
    while (M--) {
        int tip,x;
        in>>tip;
        if (tip == 1) {
            in>>x;

            heap[++N] = elem(x,++nrInsert);
            pos[nrInsert] = N;
            percolate(N);
        }
        else if (tip == 2) {
            in>>x;

            int p = pos[x];
            swap_heap(p,N);
            --N;
            if (heap[p].val < heap[p/2].val) {
                percolate(p);
            }
            else {
                sift(p);
            }
        }
        else {
            out<<heap[1].val<<'\n';
        }
    }

    in.close();out.close();
    return 0;
}

void sift(int node) {
    int son = 0;
    do {
        son = 0;
        int fs = node<<1,ss = fs+1;
        if (fs <= N) {
            son = fs;
            if (ss <= N && heap[ss].val < heap[fs].val) {
                son = ss;
            }
        }

        if (son && heap[son].val < heap[node].val) {
            swap_heap(node,son);
            swap(node,son);
        }
        else {
            son = 0;
        }
    }
    while (son);
}

void percolate(int node) {
    int dad = node>>1;
    while (node != 1 && heap[node].val < heap[dad].val) {
        swap_heap(node,dad);
        node = dad;
        dad = node>>1;
    }
}

void swap_heap(int a,int b) {
    swap(pos[heap[a].idx],pos[heap[b].idx]);
    swap(heap[a],heap[b]);
}