array<int>^ input = {18, 16, 17, 18, 16, 19, 14, 17, 19, 18};
Generic::List<int>^ ages = gcnew Generic::List<int>((Generic::IEnumerable<int>^) input);

Generic::ICollection<int>^ result = makeSET<int>(ages);

using namespace System;
using namespace System::Collections;

generic <typename T>
Generic::ICollection<T>^ makeSET(Generic::ICollection<T>^ items)
{
Generic::Dictionary<T, int>^ set = gcnew Generic::Dictionary<T, int>();
for each(T item in items) if (!set->ContainsKey(item)) set->Add(item, 0);
return set->Keys;
}

int main()
{
array<int>^ input = {18, 16, 17, 18, 16, 19, 14, 17, 19, 18};
Generic::List<int>^ ages = gcnew Generic::List<int>((Generic::IEnumerable<int>^) input);

Generic::ICollection<int>^ result = makeSET<int>(ages);

for each(int item in result) Console::Write("{0}, ", item);
}

list<int> input;
input += 18, 16, 17, 18, 16, 19, 14, 17, 19, 18;
input.sort();
unique_copy(input.begin(), input.end(), ostream_iterator<int>(cout, "\n"));

#include <algorithm>
#include <iterator>
#include <iostream>

#include <boost/assign/std/list.hpp>

using namespace std;
using namespace boost::assign;

int main()
{
list<int> input;
input += 18, 16, 17, 18, 16, 19, 14, 17, 19, 18;
input.sort();
unique_copy(input.begin(), input.end(), ostream_iterator<int>(cout, "\n"));
}