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#include<bits/stdc++.h>
using namespace std;
ifstream f("heapuri.in"); ofstream g("heapuri.out");
multiset <int> H;
int n,u,v[200001];
int main()
{ f>>n;
for(int tip,x;n;n--)
{ f>>tip;
switch(tip)
{ case 1 : f>>x; v[++u]=x; H.insert(x); break;
case 2 : f>>x; H.erase(H.find(v[x])); break;
case 3 : g<<*H.begin()<<'\n';
}
}
g.close(); f.close(); return 0;
}