Low Coder的博客

I Hate ItTime Limit: 9000/3000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 92308    Accepted Submission(s): 35042Problem Description很多学校流行一种比较的习惯。老师们很喜欢询问，从某某到某某当...

E. Permutation PolygonThere are n cities in Regularia, Alice's homeland. They are located at the vertices of a regular n-gon. The cities are numbered from 1 to nin a clockwise order (see the figure)...

Problem J. Jim and the Skyscraper题意：给定一个序列， 要你找出区间满足：区间首尾元素相等且中间元素均小于首尾元素。要求你找出这样的区间个数解法：线段树首先存储每个数字所有的出现位置，然后从最小的数开始遍历（遍历数字）对于某个数字 如果出现的次数大于等于2然后我们要做的事情是 将所有的位置进行划分：如果所有的位置之间任意两个数都可以，则答...

A subsequence of a sequence is a sequence which is obtained by deleting zero or more elements from the sequence. You are given a sequence A in which every element is a pair of integers  i.e  A = [(a...