[20250903] BOJ / G1 / K-지폐 / 한종욱 #806
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🧷 문제 링크
https://www.acmicpc.net/problem/28131
🧭 풀이 시간
80분
👀 체감 난이도
✏️ 문제 설명
다익스트란데 cost가 k배수이면서 최솟값을 찾는 다익스트라
🔍 풀이 방법
dist[i][j]: i번 노드까지 가는데, 총 거리를 K로 나눈 나머지가 j인 경우의 최소 거리이 상태로 정의하고 기본 다익스트라로 dist값들을 모두 구한다.
⏳ 회고
상태 정의를 못했다. bfs의 3차원 visited같은 느낌이었는데 응용을 못했다. 더 많은 문제를 풀어야겠는데....