#include <queue>
#include <string>
#include <iostream>

int main() {
	int const N = 10;
	std::string largest_countries[N] = {
		"Russia", "Canada", "China", "United States",
		"Brazil", "Australia", "India", "Argentina",
		"Kazakhstan", "Algeria"
	};

	std::priority_queue< std::string,
                             std::vector< std::string >,
                             std::greater< std::string > > pq;

	for ( int i = 0; i < N; ++i ) {
		pq.push( largest_countries[i] );
	}

	std::cout << "Ten largest countries (alphabetical):"
	          << std::endl;

	for ( int i = 0; i < N; ++i ) {
		std::cout << pq.top() << std::endl;
		pq.pop();
	}

	return 0;
}