[USACO06NOV]路障Roadblocks
摘要:
题意 Bessie has moved to a small farm and sometimes enjoys returning to visit one of her best friends. She does not want to get to her old home too quic 阅读全文
posted @ 2019-01-25 19:52 autoint 阅读(164) 评论(0) 推荐(0) 编辑