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Cod sursa(job #664520)
#include <fstream>
#include <set>
using namespace std;
set <int> h;
int nr,i,n,r,x,a[200001];
ifstream f("heapuri.in");
ofstream g("heapuri.out");
int main()
{
f>>n;
for (i=1;i<=n;i++) {
f>>r;
if (r==1)
{
f>>x;
a[++nr]=x;
h.insert(x);
}
else if (r==2)
{
f>>x;
h.erase(a[x]);
}
else g<< *h.begin () <<'\n';
}
return 0;
}