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#include <bits/stdc++.h>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
vector <int> v,k;
int n,a,x;
int main()
{
f>>n;
for(int i=1;i<=n;i++)
{ f>>a;
if(a==1)
{f>>x;
v.push_back(x);
k.push_back(x);
}
else
if(a==3)
{
make_heap(v.begin(),v.end());
g<<min(v[v.size()-1],v[v.size()-2])<<'\n';
}
else
if(a==2)
{
f>>x;
for(int j=0;j<v.size();j++)
if(k[x-1]==v[j])
v.erase(v.begin()+j),j=v.size()+1;
}
}
return 0;
}