// This example illustrates use of the C++11 unordered_set.
// It also illustrates C++11 list initialization
// (not to be confused with a ctor initialization list)
// and the C++11 range-based for loop.

#include <iostream>
#include <unordered_set>

using namespace std;

int main() {
    unordered_set<int> us = { 123, 456, 789, 2345, 6789, 12, 34, 56, 78 };

    for (const auto val : us)		// Note that the order of output
	cout << val << ' ';		// is not really any rational order
    cout << '\n';

    return 0;
}