#include <cstdio>
#include <set>
using namespace std;
int N, op, i, x, p = 0;
set <int> multime;
int v[100001];

int main ()
{
    freopen("heapuri.in", "r", stdin);
    freopen("heapuri.out", "w", stdout);
    scanf("%d\n", &N);
    for (i=1; i<=N; i++)
    {
        scanf("%d", &op);
        if (op == 1)
        {
            scanf("%d\n", &x);
            p++;
            multime.insert(x);
            v[ p ] = x;
        }
        else
        if (op == 2)
        {
            scanf("%d\n", &x);
            multime.erase(v[x]);
        }
        else
            printf("%d\n", *multime.begin());
    }
    return 0;
}