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Question #113 Difficulty: 2

According to the C++17 standard, what is the output of this program? 

    #include <iostream>

using namespace std;

template<typename T>
void f(T) {
    cout << 1;
}

template<>
void f(int) {
    cout << 2;
}

void f(int) {
    cout << 3;
}

int main() {
    f(0.0);
    f(0);
    f<>(0);
}

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