#include <iostream>
#include <vector>

using namespace std;

std::vector<int>
make_vector() {
	std::vector<int> r(20);
	for(std::size_t i = 0; i != r.size(); ++i)
		r[i] = i*3;
	return r;
}
int main() {
	const auto v = make_vector();
	for(const auto & i : v)
		std::cout << i << " ";
	std::cout << std::endl;
	return 0;
}