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

int main() {
	vector<array<int, 5>> foo;
	
	foo.push_back({0, 1, 2, 3, 4});
	foo.resize(2);
	foo.push_back({5, 6, 7, 8, 9});
	
	for(auto& i : foo) {
		for(auto& j : i) {
			cout << j << ' ';
		}
		cout << endl;
	}
	return 0;
}