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Question #196 Difficulty: 2

According to the C++23 standard, what is the output of this program?

 #include <iostream>
namespace x {
 class C {};
 void f(const C& i) {
 std::cout << "1";
 }
}
namespace y {
 void f(const x::C& i) {
 std::cout << "2";
 }
}
int main() {
 f(x::C());
}

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