[20250821] PGM / LV3 / 광고 삽입 / 혁준 #708
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🧷 문제 링크
https://school.programmers.co.kr/learn/courses/30/lessons/72414?language=java
🧭 풀이 시간
20분
👀 체감 난이도
✏️ 문제 설명
동영상의 길이와 광고의 길이가 주어지고, 사람들의 영상 시청 시작 시각과 종료 시각이 주어진다.
동영상 중간에 광고를 넣어서 사람들의 누적 광고 시청 시간을 최대로 해보자.
🔍 풀이 방법
0초 ~ 360,000초까지 범위가 제한되기 때문에, 시각을 정수로 바꿔서 풀었다.
사람들의 영상 시청 구간으로 imos를 해서 각 순간마다의 시청자 수를 구하고,
이걸로 누적 합 구한뒤 슬라이딩 윈도우로 누적 광고 시청 시간의 최대 지점을 찾았다.
⏳ 회고
헷갈린다