Thank you for the most helpful comment. You must be a god in development.

wow

I learn new standard library methods by seeing other people's solutions WAY faster than reading by the references.

very inefficient

Thank you so much for your quick reply. I really appreciate it.

Hi! that's a lambda expression. You can read more about it here: https://en.cppreference.com/w/cpp/language/lambda or https://docs.microsoft.com/en-us/cpp/cpp/lambda-expressions-in-cpp?view=msvc-160

The string parsing code is much larger than all other examples and it even contains a goto...

JudgeWin is a confusing name for a method that also changes the positions.

I don't get how you managed to change b.

Thanks! My goal is to use the STL features as much as possible.

This code is just a little bit to clever for my case. I do really like that the actual loop is very easy to read.

The [] lead to list comprehension which will actually create the array. Omitting [] is the same as replacing it by (). That is a generator expression, which does not construct the array first and should therefore be preferred.