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template <class T> class plus_monoid { public: using value_type = T; static T operation(const T l, const T r) { return l + r; } static constexpr T identity = 0; };
#line 1 "other/plus_monoid.cpp" template <class T> class plus_monoid { public: using value_type = T; static T operation(const T l, const T r) { return l + r; } static constexpr T identity = 0; };