#include<cstdio>
#include<set>
#include<vector>
using namespace std;
#define NMAX 200001
set<int> h;
int n,x,y,nr=0;
int main()
{freopen("heapuri.in","rt",stdin); freopen("heapuri.out","wt",stdout);
 scanf("%d",&n);
 for(register int i=0;i<n;++i)
  {scanf("%d",&x);
   switch(x)
		{case 1 : scanf("%d",&y);nr++;h.insert(y);break;
		 case 2 : scanf("%d",&y);h.erase(v[y-1]);break;
		 case 3 : printf("%d\n",*h.begin()); break; 
		}
   }
 return 0;
}