[20250206] BOJ / 골드2 / The Other Way / 권혁준#55
Merged
ShinHeeEul merged 1 commit intomainfrom Feb 6, 2025
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
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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/14554
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
정점$N$ 개, 간선 $M$ 개인 무방향 그래프에서 $S$ -> $E$ 최단 경로의 개수 구하기
🔍 풀이 방법
다익스트라 돌면서 새로운 배열 C에 경로의 개수를 저장해 주었다.
C[i] = i까지 오는 최단 경로의 수
D[i]가 갱신될 때 C[i]까지 같이 갱신해주면 된다.
D[i]가 갱신되지 않고, 같은 값이 들어오면 경로 수를 C[i]에 더해줘야 한다.
⏳ 회고
Comparator의 비교 함수 리턴값은 항상 int여야 한다는 걸 처음 알았다..