Codeforces-859A - Declined Finalists - 水题
题目：This year, as in previous years, MemSQL is inviting the top 25 competitors from the Start[c]up qualification round to compete onsite for the final round. Not everyone who is eligible to compete ...
Lucien's Blog
加载中……Codeforces-855B - Marvolo Gaunt's Ring - DP
题目：Professor Dumbledore is helping Harry destroy the Horcruxes. He went to Gaunt Shack as he suspected a Horcrux to be present there. He saw Marvolo Gaunt's Ring and identified it as a Horcrux. Alt...
Codeforces-855A - Tom Riddle's Diary - 水题
题目：Harry Potter is on a mission to destroy You-Know-Who's Horcruxes. The first Horcrux that he encountered in the Chamber of Secrets is Tom Riddle's diary. The diary was with Ginny and it forced he...
Codeforces-846C - Four Segments - 枚举 + 前缀和
题目：You are given an array of n integer numbers. Let sum(l, r) be the sum of all numbers on positions from l to r non-inclusive (l-th element is counted, r-th element is not counted). For indices l ...
Codeforces-846B - Math Show - 暴力
题目：Polycarp takes part in a math show. He is given n tasks, each consists of k subtasks, numbered 1 through k. It takes him tj minutes to solve the j-th subtask of any task. Thus, time required to ...