You Do Need power plug adapter while traveling from San Marino to Cuba.

Here is Why You Need An Adapter

The outlet and plug type used in Cuba are A, B, C and L and in San Marino are C, F and L. This is how they look like.

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L

Cuba

In Cuba, outlets of type A, B, C and L are in use.

Type A

Type B

Type C

Type L