leetcode.com/explore/learn/card/recursion-i/251/scenario-i-recurrence-relation/2378/ Explore - LeetCode LeetCode Explore is the best place for everyone to start practicing and learning on LeetCode. No matter if you are a beginner or a master, there are always new topics waiting for you to explore. leetcode.com 순서 바꿀 때 temp 변수 썼던 것처럼 변수 만들어서 담아두고 바꾸는 방법 그리고 Node 말고 내부 int 값만 변경하는 것을 생각했으나, 문제 자체가..