namespace std {
	    template <class InputIter, class ForwIter>
	    ForwIter uninitialized_fill_n (InputIter beg, InputIter end,
	                                   ForwIter dest)
	    {
	        typedef typename iterator_traits<ForwIter>::value_type VT;
	        ForwIter save(dest);
	        try {
	            for (; beg!=end; ++beg,++dest) {
	                new (static_cast<void*>(&*dest))VT(value);
	            }
	            return dest;
	        }
	        catch (...) {
	            for (; save!=dest; ++save) {
	                save->~VT();
	            }
	            throw;
	        }
	    }
	}