#include <iostream>
#include <vector>

int main() {
	auto n = 10;
	
	
	// dont use "a{n, 0}"" initialization, because that means: "construct a vector with the two int values inside"
	std::vector<int> a(n, 0); 
	
	
	int i{};
	for (auto x : a) std::cout << i++ << ":" << x << "\n";
	
	return 0;
}