[20251027] BOJ / G5 / 숫자고르기 / 설진영 #1244
Merged
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🧷 문제 링크
https://www.acmicpc.net/problem/2668
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
2행 N열 표에서 첫째 줄은 1~N, 둘째 줄은 주어진 정수들이 있을 때, 첫째 줄에서 선택한 숫자 집합과 그 아래 둘째 줄 숫자 집합이 일치하도록 최대한 많이 선택하기
🔍 풀이 방법
각 위치 i에서 next[i]로 가는 간선이 있다고 생각하고, 조건을 만족하는 집합은 반드시 사이클을 형성한다는 점을 이용함
⏳ 회고
신박하네요