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Question #2 Difficulty: 2

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

    #include <iostream>
#include <string>

void f(const std::string &) { std::cout << 1; }

void f(const void *) { std::cout << 2; }

int main() {
  f("foo");
  const char *bar = "bar";
  f(bar);
}

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