Finding Doubles

[rockz]

If I have a piece of working as per below:

default_random_engine engine
	{ 
		static_cast<unsigned int>(time(0)) 
	};

	uniform_int_distribution<unsigned int> randomInt{ 1, 500 };

	for (int i = 1; i < 100; i++) //first loop
	{
		for (int j = 1; j < 50; j++) //second loop
		{
			cout << randomInt(engine) << " ";
		}
		cout << endl;
	}

How do I find doubles generated by the second loop?