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#ifndef EXT_UTILS_INCLUDED
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#define EXT_UTILS_INCLUDED
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namespace ext
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{
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template <class Ty1, class Ty2>
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class pair
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{
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	public:
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		typedef Ty1 first_type;
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		typedef Ty2 second_type;
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		Ty1 first;
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		Ty2 second;
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		pair()
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			: first(Ty1()), second(Ty2()) { }
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		pair(const Ty1& val1, const Ty2& val2)
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			: first(val1), second(val2) { }
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		pair(const pair& other)
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			: first(other.first), second(other.second) { }
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};
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template <class Ty>
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class less
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{
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	public:
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		bool operator() (const Ty& left, const Ty& right)
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		{
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			return first < second;
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		}
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};
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}; // namespace ext
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#endif // !defined(EXT_UTILS_INCLUDED)