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🧷 문제 링크
https://www.acmicpc.net/problem/16472
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
고냥이는 최대 N개의 문자 종류만 알아들을 수 있음. 이때 문자열 중에서 알아들을 수 있는 최대 문자열 길이를 출력
🔍 풀이 방법
투 포인터
left right 두 개의 포인터로 쭉 오른쪽으로 이동하면서 map을 통해 현재 문자 종류가 N을 넘어가지 않게끔 쭉 확인함.
⏳ 회고
반복문에서 현재 문자 종류가 N보다 작아야 받을 수 있게끔 했었는데 생각해보면 N개가 충족됐더라도 이미 있는 단어가 들어오는 경우에는 받을 수 있게 했어야 했다. 바로 생각을 못했던게 아쉽다.