Merged
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
🧷 문제 링크
https://www.acmicpc.net/problem/19942
🧭 풀이 시간
25분
👀 체감 난이도
✏️ 문제 설명
N개의 식재료 중 일부를 선택해서 단백질, 지방, 탄수화물, 비타민의 최소 조건을 만족하면서 비용을 최소화하는 문제. 같은 비용이면 사전순으로 가장 빠른 조합을 출력해야 함.
🔍 풀이 방법
백트래킹으로 해결함. 선택 / 선택X 의 2가지 경우를 모두 탐색하되 가지치기로 최적화
조건 만족하면 즉시 종료
비용 초과하면 가지치기로 중단
처음에는 비트마스킹으로 풀었는데 사전순 처리가 복잡해서 백트래킹으로 변경함.
⏳ 회고
N≤15라서 완탐문제 같긴 했음
비트마스킹으로 풀려 했는데 백트래킹이 훨씬 깔끔하고 빠름