0_0_11682698_67.cpp: In function `std::ostream& operator<<(std::ostream&, const Point3&)':
0_0_11682698_67.cpp:33: error: no match for 'operator<<' in 'os << "("'
0_0_11682698_67.cpp:32: note: candidates are: std::ostream& operator<<(std::ostream&, const Point3&)
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