#include <stdio.h>
#include <set>
using namespace std;
set<long> heap;
long n,x,i,o,v[200005],q;
int main()
{
    FILE *f1,*f2;
    f1=fopen("heapuri.in","r");
    f2=fopen("heapuri.out","w");
    fscanf(f1,"%ld",&n);
    for(i=0;i<n;i++)
    {
        fscanf(f1,"%ld",&o);
        if(o==1)
        {
            fscanf(f1,"%ld",&v[++q]);
            heap.insert(v[q]);
        }
        else if(o==2)
        {
            fscanf(f1,"%ld",&x);
            heap.erase(v[x]);
        }
        else
            fprintf(f2,"%ld\n",*heap.begin());
    }
    return 0;
}