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Question #219 Difficulty: 2

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

    #include <iostream>

template<typename T>
T sum(T arg) {
    return arg;
}

template<typename T, typename ...Args>
T sum(T arg, Args... args) {
    return arg + sum<T>(args...);
}

int main() {
    auto n1 = sum(0.5, 1, 0.5, 1);
    auto n2 = sum(1, 0.5, 1, 0.5);
    std::cout << n1 << n2;
}

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