[20250901] BOJ / G3 / 육각 보드/ 한종욱 #790
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540분이요? |
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다시 태어나도 못 풀듯...... |
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🧷 문제 링크
https://www.acmicpc.net/problem/12946
🧭 풀이 시간
540분
👀 체감 난이도
✏️ 문제 설명
육각 보드에 겹치지 않게 색을 몇 개나 칠할 수 있을까요?
🔍 풀이 방법
이분 그래프로 풀다가, 두 개로 색칠 못하면 3을 리턴
육각형에서는 최대가 3이래요. 저는 몰랐어요. 그래서 너무 어려웠어요.
⏳ 회고
arr[nx][ny] = 3 - arr[current[0]][current[1]];라는 아이디어가 좋았다.