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골드 6은 어느 나라 티어인가요 ..? |
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미안합니다 |
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🧷 문제 링크
https://www.acmicpc.net/problem/1914
🧭 풀이 시간
40분
👀 체감 난이도
✏️ 문제 설명
N개의 원판을 하노이탑 했을 때 몇회 이동해야하는지 출력하고
N이 20이하라면 그 이동경로도 출력하는 문제입니다.
🔍 풀이 방법
하노이탑 재귀를 만들어서 풀었습니다.
N이 최대 100으로 매우 큰데 하노이탑 이동 횟수는 2^N -1 이기 때문에 long으로도 안됩니다. 그래서 BigInteger 사용했습니다.
⏳ 회고
처음에 long으로 풀었는데 틀릴 수가 없는데 틀렸다 해서 열받았는데 long 범위 문제였습니다.