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#include <iostream>
#include <fstream>
#include <set>
#include <vector>
int main(){
std::ifstream f("heapuri.in");
std::ofstream g("heapuri.out");
std::set<int> numere;
std::vector<int> ordine;
int n, operatie, x;
f >> n;
while(n){
f >> operatie;
switch(operatie){
case 1:{
f >> x;
ordine.push_back(x);
numere.insert(x);
break;
}
case 2:{
f >> x;
numere.erase(ordine[x - 1]);
break;
}
case 3:{
g << *numere.begin() << '\n';
break;
}
}
--n;
}
return 0;
}