#include <iostream>
#include <fstream>
#include <vector>
#include <set>


const int INF = 0x3f3f3f3f;
std::ifstream f("heapuri.in");
std::ofstream g("heapuri.out");
std::vector<int> v;
std::multiset<int> mst;


int main()
{
	v.push_back(0);

	int n; f >> n;
	for (int i = 1, op; i <= n; i++) {
		f >> op;

		if (op == 1) {
			int x; f >> x;
			v.push_back(x);
			mst.insert(x);
		}
		if (op == 2) {
			int x; f >> x;
			mst.erase(mst.find(v[x]));
		}
		if (op == 3) {
			g << *mst.begin() << '\n';
		}
	}
	g.flush();


	system("pause");
	f.close();
	g.close();
	return 0;
}