摘要： 6597: Don't Be a Subsequence 题目描述 A subsequence of a string S is a string that can be obtained by deleting zero or more characters from S without chan 阅读全文

摘要： 6603: ConvexScore 题目描述 You are given N points (xi,yi) located on a two-dimensional plane. Consider a subset S of the N points that forms a convex poly 阅读全文