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🧷 문제 링크
https://www.acmicpc.net/problem/27652
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
집합 A, B에 대해 다음 쿼리를 수행해보자.
🔍 풀이 방법
A에는 S의 모든 접두사를 다 넣어놓고, B에는 S의 모든 접미사를 다 넣어놓는다.
제거 연산 시에도 각각에서 모든 접두/접미사를 제거한다.
이때, 중복 원소가 생길 수 있으니까 multiset을 사용했다.
find 연산에서는 S의 모든 접두사와 접미사에 대해 A, B에서 존재하는 개수를 세서 계산했다.
⏳ 회고
C++만세