[20250731] BOJ / G3 / 최소비용 구하기 2 / 이준희#580
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ShinHeeEul merged 1 commit intomainfrom Jul 30, 2025
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🧷 문제 링크
https://www.acmicpc.net/problem/11779
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
도시와 그 도시 사이를 이동하는 버스 정보가 주어졌을 때
주어진 출발점에서 도착점까지의 최소비용 경로에 포함된 도시 갯수와 그 도시를 출력하는 문제입니다.,
🔍 풀이 방법
다익스트라를 이용해 최소비용을 구하면서 prev 배열에 출발했던 도시의 인덱스를 저장했습니다.
계산이 완료된 후 prev을 역추적하여 경로 및 방문 도시 개수를 파악했습니다.
⏳ 회고
최근 역추적 문제가 심심치않게 보이는데 점점 숙달 되는 것 같습니다.
다익스트라와 역추적에 관한 개념만 있었다면 G3까지는 아닌 것 같습니다.