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Cod sursa(job #964019)
#include <fstream>
#include <set>
using namespace std;
ifstream f("heapuri.in");
ofstream g("heapuri.out");
long long n,i,z,c,poz[1000000],nr;
set <long long> Heap;
int main()
{
f>>n;
for (i=1;i<=n;i++)
{
f>>z;
if (z==1)
{
f>>c;
poz[++nr]=c;
Heap.insert(c);
}
if (z==2)
{
f>>c;
Heap.erase(poz[c]);
}
if (z==3)
g<<(*Heap.begin())<< '\n';
}
f.close();
g.close();
}