并查集
codeforces 870E Points, Lines and Ready-made Titles
You are given n distinct points on a plane with in 阅读更多…
动态规划
codeforces 869c The Intriguing Obsession
— This is not playing but duty as allies of justic 阅读更多…
You are given n distinct points on a plane with in 阅读更多…
— This is not playing but duty as allies of justic 阅读更多…