V + (으) 나마나 is used to show that whether you perform the action or not, the result is the same:
터미널에 가나마나 아마 마지막 버스를 출발했어요.
It doesn’t matter whether or not you go to the terminal, the last bus has already left.
해보나마나 게임을 이기는 것이 불가능해요.
It doesn’t matter whether you try – it’s impossible to win this game.
물어보나마나 안 된다고 할 거예요.
There’s no point asking, they will say no.
이 책은 읽으나마나 재미 없어요
There’s no point reading this book – it’s boring.
맛 없으나마나 학생들이 학교 밥을 먹어요.
Whether or not the food it’s delicious, students always eat it.