#include<cstdio>
#include<set>
using namespace std;
#define N 200001
int v[N],nr;
multiset<int>heap;
multiset<int>::iterator it;
int main(){
	int k,x,n;
	freopen("heapuri.in","r",stdin);
	freopen("heapuri.out","w",stdout);
	scanf("%d",&n);
	for(int i=1;i<=n;++i){
		scanf("%d",&k);
		if(k!=3) scanf("%d",&x);
		if(k==1){
			v[++nr]=x;
			heap.insert(x);
		}
		if(k==2)
			heap.erase(heap.find(v[x]));
		if(k==3){
			it=heap.begin();
			printf("%d\n",*it);
		}
	}
	return 0;
}