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Question #279 Difficulty: 1

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

    #include <iostream>
#include <variant>

struct C
{
    C() : i(1){}
    int i;
};

struct D
{
    D() : i(2){}
    int i;
};

int main()
{
    const std::variant<C,D> v;
    std::visit([](const auto& val){ std::cout << val.i; }, v);
}

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