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#include <iostream>
#include <set>
#include <fstream>
#include <vector>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
set <int> S;
vector <int> V;
std::set<int>::iterator it;
int n;
int main()
{int i,nr=0;
f>>n;
for(i=1;i<=n;i++)
{ int op;
f>>op;
if(op==1)
{ int x;
f>>x;
nr++;
S.insert(x);
V.push_back(x);
}
if(op==2)
{int x,nrnr;
f>>x;
nrnr=V[x-1];
S.erase(nrnr);
// V.erase(V.begin()+x-1);
}
if(op==3)
{
g<<*S.begin()<<'\n';
}
}
f.close();
g.close();
return 0;
}