摘要：
ACM ICPC 2018 南京赛区网络预赛 Lpl and Energy saving Lamps 线段树 [TOC] 题面 During tea drinking, princess, amongst other things, asked why has such a good natured 阅读全文
摘要：
ACM ICPC 2018 南京赛区网络预赛 Magical Girl Haze 最短路 [TOC] 题面 There are N cities in the country, and M directional roads from uu to v(1$\le$ u, v$\le$ n)v(1≤u 阅读全文