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Question #125 Difficulty: 2

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

    #include <iostream>

using namespace std;

template <class T> void f(T) {
  static int i = 0;
  cout << ++i;
}

int main() {
  f(1);
  f(1.0);
  f(1);
}

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