During the time of Cold War, both USA and USSR have a program to help their allied country economically.
For USA, they have a policy called "Marshal Plan" which is aimed to support democratic country by giving them economic support.
This is a map showing the support USA gave.
For USSR, they have an organization called "Comecon" to support their communist country.
This is a map showing Comecon alliance. Yugoslavia is the country with a bright red colour with a status of "Observer".
According to the maps, the countries surrounding Yugoslavia were economically supported by either USA or USSR, but Yugoslavia didn't really participate in any.
My question is how did Yugoslavia economically survive when other countries have economic assistance but they didn't.