#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;
}
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