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Cod sursa(job #848205)
#include<fstream>
#include<set>
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, i=1; i<=n; ++i)
{ f>>tip;
if (tip == 1) {f>>x; v[++u]=x; H.insert(x);}
if (tip == 2) {f>>x; H.erase(H.find(v[x]));}
if (tip == 3) g<<*H.begin()<<'\n';
}
g.close(); return 0;
}