#include <bits/stdc++.h>

using namespace std;

#define     mp              make_pair
#define     fs              first
#define     sc              second
#define     pob             pop_back
#define     pub             push_back
#define     eps             1E-7
#define     sz(a)           a.size()
#define     count_one       __builtin_popcount;
#define     count_onell     __builtin_popcountll;
#define     fastIO          ios_base::sync_with_stdio(false)
#define     PI              (acos(-1.0))
#define     linf            (1LL<<62)//>4e18
#define     inf             (0x7f7f7f7f)//>2e9

#define DEBUG 1
#ifdef DEBUG
#define D(x) x
#else
#define D(x)
#endif

FILE *in = fopen("heapuri.in", "r");
FILE *out = fopen("heapuri.out", "w");

int inv[200001];
set<int, less<int>> in1;

int main()
{
    int n, type, x;
    fscanf(in, "%d", &n);

    for(int i = 1; n; n--) {
        fscanf(in, "%d", &type);
        switch(type) {
            case 1:
                fscanf(in, "%d", &x);
                in1.insert(x);
                inv[i] = x;
                i++;
            break;

            case 2:
                fscanf(in, "%d", &x);
                in1.erase(inv[x]);
            break;

            case 3:
                fprintf(out, "%d\n", *(in1.begin()));
            break;
        }
    }
    return 0;
}