[20250728] BOJ / G4 / 가장 긴 바이토닉 부분 수열 / 이준희#560
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ShinHeeEul merged 1 commit intomainfrom Jul 27, 2025
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🧷 문제 링크
https://www.acmicpc.net/problem/11054
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
S1 < S2 < ... Sk-1 < Sk > Sk+1 > ... SN-1 > SN을 만족하는 수열을 바이토닉 수열이라고 할 때
주어진 수열에서 가장 긴 바이토닉 부분 수열을 구하는 문제입니다.
🔍 풀이 방법
n이 크지 않기 때문에 가장 긴 증가하는 부분수열
가장 긴 감소하는 부분수열을 각각 구하고
그 길이를 합치는 식으로 구했습니다.
⏳ 회고
dp 입문용 문제인거 같습니다. 난이도가 고평가된듯