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🧷 문제 링크
https://www.acmicpc.net/problem/14249
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
N개의 돌이 일렬로 놓여있다.
i번 돌에서는 왼쪽 혹은 오른쪽으로 a[i]만큼 점프할 수 있다.
S번 돌에서 출발해서 방문할 수 있는 최대 돌의 개수를 구해보자.
🔍 풀이 방법
SCC단위로 그래프를 압축시켜DAG를 만든다.압축된 점의 가중치는 해당
SCC에 속한 점의 개수로 두고, 이 그래프에서위상 정렬+DP로 최대 방문 가능한 점의 수를 구해줬다.⏳ 회고
얼마 전에 푼 ATM 문제랑 비슷함