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🧷 문제 링크
https://www.acmicpc.net/problem/2306
🧭 풀이 시간
60분
👀 체감 난이도
✏️ 문제 설명
주어진 DNA 서열의 부분 서열들 중에서 길이가 최대가 되는 KOI 유전자를 찾아 그 길이를 출력하시오.
🔍 풀이 방법
로 상태정의를 했다.
문제에서 KOI 유전자를 만드는 조건은 2개이다.
먼저 X가 KOI 유전자라면, aXt와 gXc도 KOI 유전자이기 때문에 이 부분을 먼저 dp로 계산하고, X, Y가 KOI 유전자라면 이 둘을 연결한 XY도 KOI 유전자이기 때문에 이 부분을 다음에 계산했다.
⏳ 회고
보자마자 구간 dp가 떠올라서 기뻤다.