2018年9月9日
Trace 2018徐州icpc网络赛 （二分）（树状数组）
摘要： Trace There's a beach in the first quadrant. And from time to time, there are sea waves. A wave ( xxx , yyy ) means the wave is a rectangle whose vert 阅读全文
posted @ 2018-09-09 22:12 进击的黑仔 阅读(421) 评论(0) 推荐(1)