摘要: P3081 USACO13MAR Hill Walk G 题目描述 There are N hills (1 <= N <= 100,000). Each hill takes the form of a line segment from (x1, y1) to (x2, y2) where x1 阅读全文
posted @ 2025-12-25 19:22 南北天球 阅读(4) 评论(0) 推荐(0)