#include <iostream>
#include <cstdlib>
#include <vector>
using namespace std;

int main()
{
	using vecint = vector<int>;
	vecint v;
	v.push_back(10);
	v.push_back(20);
	v.push_back(30);

	for (auto val: v) {
		cout << val << "\n";
	}

	return EXIT_SUCCESS;
}