Code:
G:\HeloWorld\mn\mn.cpp|41|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&)|
G:\HeloWorld\mn\mn.cpp|35|note: candidate: Rozklady_na_tsili_kvadraty::Rozklady_na_tsili_kvadraty(const Rozklady_na_tsili_kvadraty&, int)|
Lemme guess, the second one has a default value.
If so, then remove the default value from the declaration.

Also fix all the other warnings as well.