You Do Need power plug adapter while traveling from Lesotho 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 Lesotho is M. This is how they look like.

Lesotho

In Lesotho, outlets of type M are in use.

Type M

San Marino

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

Type C

Type F

Type L