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#include <fstream>
#include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
multiset <int> q;
multiset <int> :: iterator it;
int v[200002];
int main()
{
int n,c,x,nr=0;
f>>n;
while(n--)
{
f>>c;
if(c==1)
{
f>>x;
++nr;
v[nr]=x;
q.insert(x);
}
else
{
if(c==2)
{
f>>x;
q.erase(v[x]);
}
else
{
it=q.begin();
g<<*it<<'\n';
}
}
}
return 0;
}