#include <iostream>
using namespace std;
 
#include <string>
#include <iostream>
 
class Simple_fraction{
 
public:
	Simple_fraction(int num, int den)
	: numerator(num)
	, denominatior(den)
	{}
	friend std::ostream& operator<< (std::ostream& out, const Simple_fraction& sf_a)
	{
		out << sf_a.numerator << '/' << sf_a.denominatior;
		return out;
	}
 
 
private:
	int numerator;
	int denominatior;
};
 
int main() {
	Simple_fraction s(1,2);
	std::cout << s << std::endl;
	return 0;
}

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