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#include <iostream>
#include <set>
#include<fstream>
using namespace std;
set <int> h;
set<int>::iterator it;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int i,p,N,x,v[300000000],k;
int main()
{
f>>N;
k=1;
for(i=0;i<N;i++)
{
f>>p;
if(p==1)
{
f>>x;
v[k]=x;
k++;
h.insert(x);
}
if(p==2)
{
f>>x;
h.erase(v[x]);
}
if(p==3)
{
int a;
a= *h.begin();
g<<a<<endl;
}
}
return 0;
}