You Do Need power plug adapter while traveling from South Sudan to Monaco.

Here is Why You Need An Adapter

The outlet and plug type used in Monaco are C, E and F and in South Sudan are C and D. This is how they look like.

South Sudan

In South Sudan, outlets of type C and D are in use.

Type C

Type D

Monaco

In Monaco, outlets of type C, E and F are in use.

Type C

Type E

Type F