: Step-by-step solutions for the older 2011 version are available on Vshkole .
Below are the most reliable ways to access the solutions (Reshebnik/GDZ) and the problem book itself: Online Solutions (GDZ)
If you prefer an offline copy, these sites offer direct downloads:
: For the 2016 joint edition, solutions are organized by sections like Thermal Phenomena and Electrical Phenomena on Obozrevatel .