#include <iostream>
using namespace std;
enum class Color { red, green = 1, blue };
ostream& operator<<(ostream& ostr, const Color& c) {
ostr << (int)c;
return ostr;
}
int main() {
Color c = Color::blue;
if( c == Color::blue )
cout << Color::green << "\n";
return 0;
}
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