A stop sign means stop and give way to the cars on the main road, or if the other road has same priority, to the cars on your right. If there are no cars, you are free to enter the junction. A road with a yield sign and a road with a stop sign are of the same priority and right-hand rule applies. Unless you are in Croatia where people universally refuse to accept this simple rule and consider the stop sign as having lower priority "because that car has to stop".