2018年9月10日
2018 徐州网络赛 G
摘要： There's a beach in the first quadrant. And from time to time, there are sea waves. A wave ( xx , yy ) means the wave is a rectangle whose vertexes are 阅读全文
posted @ 2018-09-10 20:08 Acerkoo 阅读(155) 评论(0) 推荐(0) 编辑