Athletes from Russia -- across every sport -- won't be allowed to compete representing the nation, the Russian flag won't be flown, and officials from the country aren't welcome in PyeongChang, South Korea.
FYI -- Russian athletes -- who can prove they aren't doping -- can compete under a neutral flag ... meaning they aren't reppin' a country.
The IOC hit Russia with the unprecedented penalty after completing an independent investigation into the country for operating an expansive state-sponsored doping program ... that included widespread cheating in the 2014 games in Sochi, Russia.
The United States Olympic Committee addressed the punishment, saying .