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#include <fstream>
#include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
multiset <int> myset;
int v[200001],i,a,x,n,k;
int main()
{ f>>n;
k=0;
for(i=1;i<=n;i++){
f>>a;
if(a==3)
g<<*myset.begin()<<'\n';
else if(a==2){
f>>x;
myset.erase(v[x]);
}
else{
f>>x;
v[++k]=x;
myset.insert(x);
}
}
return 0;
}