2019年11月6日
A - Layout（差分约束）
摘要： Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2 <= N <= 1,000) cows numbered 1..N standing along a st 阅读全文
posted @ 2019-11-06 20:56 蓉~ 阅读(407) 评论(0) 推荐(0) 编辑