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AT4723 [ABC127C] Prison 题解

这题我一看见还没反应过来, \(10^5\) 的数据显然是要线段树等数据结构……? 题意是给出一些集合,求出所有这些集合的交集的元素数量。考虑使用线段树,一开始将所有点赋值为 \(n\) ,每次将区间 \([l,r]\) 全部减 \(1\) 最后统计等于 \(n\) 的元素个数,也就是说其实可以写差分树状数组区间

Prison Break题解

题目大意 一个机器人在一个n*m的矩阵中,每一格可能是空地、禁地、开关、或充电器。机器人每走一格消耗一点电量。空地可以随意经过,禁地不可以经过,开关在机器人经过时会被关闭,每个充电器可以为机器人补满一次电量。求关闭所有开关的最小初始电量 思路 求关闭所有开关的最小初始电

列表随机分配

‘’'随机案例:分配牢房,8位狱友,随机分配三个牢房 1.创建列表,存储牢房 2.创建列表,存储狱友 3.思考:尝试不创建变量,也能实现相同结果 ‘’’ import random friends=[‘吴x凡’,‘郑x’,‘孟xx’,‘李x年’,‘商xx’,‘陈x’,‘罗xx’,‘赵xx’] prison=[]#监狱 prison1=[]#牢房

#Codeforces Round #687 Div. 2 _A. Prison Break

A. Prison Break 题目链接在此! A. Prison Break time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output There is a prison that can be represented as a rectangular matrix with

hdu3681 Prison Break

二分电池容量。 至于检查答案是否合法,我们注意到有用的点只有 F,G,Y,其他的点都是无用的。这三种点加起来最多 16 个(the sum of energy pools and power switches is less than 15)。我们就可以在图中找这三种点,对他们状压。 具体地,令 \(f(i,s)\) 表示当前点为 \(i\),其他点的经过状态

[LeetCode] 957. Prison Cells After N Days N天后的牢房

There are 8 prison cells in a row, and each cell is either occupied or vacant. Each day, whether the cell is occupied or vacant changes according to the following rules: If a cell has two adjacent neighbors that are both occupied or both vacant, then the

LeetCode 957. Prison Cells After N Days

原题链接在这里:https://leetcode.com/problems/prison-cells-after-n-days/ 题目: There are 8 prison cells in a row, and each cell is either occupied or vacant. Each day, whether the cell is occupied or vacant changes according to the following rules: If a cell ha