3가지 케이스에 대해서 생각해봐야한다
Stack의 기본개념 Array로 Stack 구현하기 Linked-List로 Stack 구현하기 Stack: Constructor Stack: push But if you have something like a tree, it's more complex, there's different ways that we can approachSo one of the common ways of do
recursion Call stack Fatorial  Step by step Code