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🧷 문제 링크
https://www.acmicpc.net/problem/19951
🧭 풀이 시간
30분
👀 체감 난이도
✏️ 문제 설명
조교 M명이 a번부터 b번까지 높이 k만큼의 흙을 덮거나 파내라고 지시할 때,
조교들의 지시를 모두 수행한 뒤 연방장 각 칸의 높이 구하기
🔍 풀이 방법
누적합 + dp
처음과 끝만 저장하고 누접합 구함
⏳ 회고
에휴 어렵다