#include <iostream>
#include <vector>

int main() {
	std::vector<int> v;
	v.reserve(10);
	for (int i = 0; i < 10; ++i)
	{
		v[i] = i * 2;
	}
	
	for (int i = 0; i < 10; ++i)
	{
		std::cout << v[i] <<  " ";
	}
	std::cout << std::endl;
	
	return 0;
}