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

Here is Why You Need An Adapter

The outlet and plug type used in San Marino are C, F and L and in Western Sahara are C and E. This is how they look like.

Western Sahara

In Western Sahara, outlets of type C and E are in use.

Type C

Type E

San Marino

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

Type C

Type F

Type L