题目连接:Codeforces 442C Artem and Array 题目大意:给出一个数组,每次删除一个数.删除一个数的得分为两边数的最小值,假设左右有一边不存在则算作0分. 问最大得分是多少. 解题思路:首先将连续的a,b,c,a > b && c > b的情况将c掉,获得min(a,b)分,这样处理后数组变成一个递増再递减的序列,除了最大和第二大的取不到.其它数字均能够得分. 例子:4 10 2 2 8 #include <cstdio> #include…

题目链接: C. Artem and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Artem has an array of n positive integers. Artem decided to play with it. The game consists of n moves. Each move g…

题目 感谢JLGG的指导! 思路: //把数据转换成一条折线,发现有凸有凹 //有凹点,去掉并加上两边的最小值//无凹点,直接加上前(n-2)个的和(升序)//数据太大,要64位//判断凹与否,若一边等于,一边大于,那中间这个也算是凹进去的,所以判断时要加上等于 //有凹点,去掉并加上两边的最小值 //无凹点,直接加上前(n-2)个的和(升序) //数据太大,要64位 //判断凹与否,若一边等于,一边大于,那中间这个也算是凹进去的,所以判断时要加上等于 #include<stdio.h> #i…

Artem and Array 经过分析我们能发现, 如果对于一个a[ i ] <= a[ i + 1 ] && a[ i ] <= a[ i - 1 ]可以直接删掉. 最后剩下一个先增后减的序列, 除了最大的两个都能加上. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<L…

大意: 给定序列$a$, 每次任选$a_i$删除, 得分$min(a_{i-1},a_{i+1})$(无前驱后继时不得分), 求最大得分. 若一个数$x$的两边都比$x$大直接将$x$删除, 最后剩余一个先增后减的序列, 然后按从大到小顺序删除 #include <iostream> #include <algorithm> #include <math.h> #include <cstdio> #include <vector> #includ…

题目链接 C. Artem and Array time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Artem has an array of n positive integers. Artem decided to play with it. The game consists of n moves. Each move go…

上一次我们拿学校的URP做了个小小的demo.... 其实我们还可以把每个学生的证件照爬下来做成一个证件照校花校草评比 另外也可以写一个物理实验自动选课... 但是出于多种原因,,还是绕开这些敏感话题.. 今天,我们来扒一下cf的题面! PS:本代码不是我原创 1. 必要的分析 1.1 页面的获取 一般情况CF的每一个 contest 是这样的: 对应的URL是:http://codeforces.com/contest/xxx 还有一个Complete problemset页面,它是这样的:…

http://codeforces.com/contest/738/problem/D Galya is playing one-dimensional Sea Battle on a 1 × n grid. In this game a ships are placed on the grid. Each of the ships consists of bconsecutive cells. No cell can be part of two ships, however, the shi…

http://codeforces.com/contest/738/problem/C Vasya is currently at a car rental service, and he wants to reach cinema. The film he has bought a ticket for starts in t minutes. There is a straight road of length s from the service to the cinema. Let's…

http://codeforces.com/contest/738/problem/A Polycarp has interviewed Oleg and has written the interview down without punctuation marks and spaces to save time. Thus, the interview is now a string s consisting of n lowercase English letters. There is…