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Re:C++ basics for competitive programming by GFK_of_xmaspast on Friday March 04, 2016 @02:20PM (#11226191)
Personally I find the version with spaces easier to read, but I'm not going to get annoyed either way.

Of course, it should also be std::vector<std::vector<int>> ...

Re:C++ basics for competitive programming by stinos on Friday March 04, 2016 @02:50PM (#11226423)
or more spacey, like std::vector< std::vector< int > >