Nowadays compilers know better.

In C++, defined names can (and should) be organized in namespaces. Standard header files use std namespace, here we use our own `helper` namespace. We must not forget to use resolution (`::`) operator when calling our helper function.

In C++, every `struct X` is defined type `X`, it is not neccessary to refer to it using `struct` keyword. But in definition, `struct` must stay, of course.

# Conflicts:
#	homework/lab01/task02/README.md