#include<cstdio>
#include<set>

using namespace std;

multiset <int> v;
int x,a[400002],n,i,op,m;

int main()
{
    freopen("heapuri.in","r",stdin);
    freopen("heapuri.out","w",stdout);
    scanf("%d",&n);
    for(i=1;i<=n;i++)
    {
        scanf("%d",&op);
        if(op==1)
        {
            scanf("%d",&x);
            v.insert(x);
            m++;
            a[m]=x;
        }
        if(op==2)
        {
            scanf("%d",&x);
            v.erase(v.find(a[x]));
        }
        if(op==3)
        {
            printf("%d\n",*v.begin());
        }
    }
    return 0;
}