[20250829] BOJ / G1 / 그림 교환 / 김민진 #768
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🧷 문제 링크
그림 교환
🧭 풀이 시간
100분
👀 체감 난이도
✏️ 문제 설명
비트 마스킹 + DP
🔍 풀이 방법
DP 진행할 때 지금 까지 구매한 사람, 다음 구매자, 구매한 가격 3차원으로 진행해야 하나 생각했는데
어차피 dfs 돌릴 거 반환값으로 그림 가격 둬서 2차원으로 해결했습니다.
지금까지 구매한 사람을 비트마스킹으로 관리했습니다.
⏳ 회고
어렵당,,