#include <iostream>
#include <fstream>
using namespace std;
ifstream fi("heapuri.in");
ofstream fo("heapuri.out");
int v[492000000],w[200002],n,x,y;

int main()
{
    fi>>n;
    int mn=1000000001,nr=0;
    for (int i=1;i<=n;i++) {
        fi>>x;
        if (x==1) {
            fi>>y;
            v[y]++;
            nr++;
            w[nr]=y;
            if (y<mn)
                mn=y;
        }
        else
            if (x==2) {
                fi>>y;
                v[w[y]]--;
                if ((mn==w[y])&&(v[mn]==0))
                    while (v[mn]==0)
                        mn++;
            }
            else
                fo<<mn<<'\n';
    }
    return 0;
}