标签 扫描线 下的文章

UPC-5556 - Black and White - 扫描线 & 线段树

题目链接：http://exam.upc.edu.cn/problem.php?id=5556题目：题目描述Consider a square map with N × N cells. We indicate the coordinate of a cell by (i, j), where 1 ≤ i, j ≤ N . Each cell has a color either white...