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template <class T> class right_zero_semigroup { public: using value_type = T; static constexpr T operation(const T &, const T &r) noexcept { return r; } };
#line 1 "other/right_zero_semigroup.cpp" template <class T> class right_zero_semigroup { public: using value_type = T; static constexpr T operation(const T &, const T &r) noexcept { return r; } };