题目大意就是给长度为 n 一个数列,有 n 每次删除,每一次删除第 i 个位置上的数,求每一次删除后剩余不连续数列的最大区间和. 输入样例 4 1 3 2 5 3 4 1 2 输出样例 5 4 3 0 第二行是原来的数列,第三行是删除第 i 个数. 这道题的正解是用并查集来做.要将删除的顺序存下来,并倒序操作,这样就相当于每一次加上第 i 数.然后判断加上的数的左右两边是否有数,有就合并,并尝试用合并的新的区间和更新答案.对了,答案也要存下来,再倒序输出,才是真正的答案. #include<cs…

C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the ar…

Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the array…

链接:Destroying Array C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destro…

C. Destroying Array 题目连接: http://codeforces.com/contest/722/problem/C Description You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the array one by one. Thus, you are given the permuta…

C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the ar…

[codeforces722C]Destroying Array 试题描述 You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the array one by one. Thus, you are given the permutation of integers from 1 to n defining the or…

原题中需要求解的是按照它给定的操作次序,即每次删掉一个数字求删掉后每个区间段的和的最大值是多少. 正面求解需要维护新形成的区间段,以及每段和,需要一些数据结构比如 map 和 set. map<int, LL>interval2Sum来维护区间段(u->v),mulitset<LL>sum 来维护最大值.那么每次删除操作后,都需要去interval2Sum中找到对应区间,然后erase掉, 重新生成left -> delId -> right两个区间段,最后在ma…

C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the ar…

time limit per test1 second memory limit per test256 megabytes inputstandard input outputstandard output You are given an array consisting of n non-negative integers a1, a2, -, an. You are going to destroy integers in the array one by one. Thus, you…

原题链接:https://vjudge.net/problem/511814/origin Description: You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the array one by one. Thus, you are given the permutation of integers from 1…

题意 输入一个含有 n(1≤n≤100000) 个非负整数的 a 数组和一个 1-n 的排列 p 数组,求每次删除 a[p[i]] 后,最大连续子段和(不能跨越被删除的)是多少? 分析 因为都是非负整数,答案一定是尽量长的区间和. s[i] 表示 a 的前缀和,区间(l,r]的和就是s[r]-s[l]. 我们用 STL 里的 set 存区间,一开始只有(0,n]区间,删去第一个数后,就要去掉(0,n]区间,加上(0,p[1]-1]和(p[1],n]区间,类似地每次删除一个数,就要去掉包含它的区间…

题意:给定 n 个数,然后每次破坏一个位置的数,那么剩下的连通块的和最大是多少. 析:用并查集来做,从后往前推,一开始什么也没有,如果破坏一个,那么我们就加上一个,然后判断它左右两侧是不是存在,如果存在,那么就合并起来, 然后不断最大值,因为这个最大值肯定是不递减,所以我们一直更新就好. 代码如下: #pragma comment(linker, "/STACK:1024000000,1024000000") #include <cstdio> #include <s…

C. Ayoub and Lost Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Ayoub had an array aa of integers of size nn and this array had two interesting properties: All the integers in the a…

用并查集维护线段,从后往前枚举没个删除的位置id[i] 那么,现在删除了这个,就是没有了的,但是上一个id[i + 1]就是还没删除的. 然后现在进行合并 int left = id[i + 1];(相当于每次都加入一个元素a[left]) 它在这个位置,如果能和左右的合并,就是左右邻居都有元素,那么当然是合并最好,因为元素都是大于0的,越长越好. 合并的时候再记录一个数组sum[pos]表示以这个为根的总和是多少.按并查集的思路更新整个并查集即可. 注意一点的就是, 要求ans[i] 那么an…

题意: 先给你一个序列,然后给你n个1-n的一个数,让你求前i个元素销毁的时候,区间字段和区间最大: 思路: 离线处理,维护新区间首尾位置的起点和终点,倒着处理: #include <bits/stdc++.h> using namespace std; typedef long long LL; typedef unsigned long long ULL; typedef pair<int,int>PII; const double eps=1e-5; const double…

一.题目描述(题目链接) 给定一个序列,按指定的顺序逐一删掉,求连续子序列和的最大值.例如序列1 3 2 5,按3 4 1 2的顺序删除,即依次删除第3个.第4个.第1个.第2个,答案为5 4 3 0. 二.问题分析 我们知道从并查集中删除元素很难,而合并非常简单.所以我们可以反过来思考,正向删除元素等同于反向添加元素,将结果存起来反向输出即可.每次添加一个元素,更新最大值.很明显新加入的点只影响相邻元素的值.每添加一个元素有4种情况:单独成集合,只与前面的成集合,只与后面的成集合,既与前面的成…

题目链接:https://cn.vjudge.net/problem/CodeForces-722C 题意 给个数组,每次删除一个元素,删除的元素作为一个隔断,问每次删除后该元素左右两边最大连续和 思路 这个题的思路马上就想到的时候,别人直接抢答,还是比较厉害的人了 离线操作,删除变成添加,添加时注意左右两边元素的最大值即可 提交过程 WA 忘了为什么WA了 AC 代码 #include <cstdio> #include <algorithm> using namespace s…

A. Broken Clock time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a broken clock. You know, that it is supposed to show time in 12- or 24-hours HH:MM format. In 12-hours format…

为一个客户做了关于每个差异otu在时间点上变化的折线图,使用python第一次做批量作图的程序,虽然是很简单的折线图,但是也是第一次使用matplotlib的纪念. ps:在第一个脚本上做了点小的改动,加上了分类信息作为图的标题,加上网格便于对照y轴丰度值,x轴的名称更加接近样品的实际名称. from __future__ import division import numpy as np import matplotlib.pyplot as plt from matplotlib.tick…

A. Broken Clock time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a broken clock. You know, that it is supposed to show time in 12- or 24-hours HH:MM format. In 12-hours format…

C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the ar…

一.方式介绍 本次测试一种采用了四种方式进行了对比,分别是:1.在RDD内部调用java API.2.调用saveAsNewAPIHadoopDataset()接口.3.saveAsHadoopDataset().4.BulkLoad方法. 测试使用的大数据版本如下(均为单机版):Hadoop2.7.4.Hbase1.0.2.Spark2.1.0 二.测试 本次测试采用10W条单一列簇单一字段固定值进行测试. 以下是测试结果: 1.JAVA API 10W条数据:1000ms.944ms 100…

C. Destroying Array time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given an array consisting of n non-negative integers a1, a2, ..., an. You are going to destroy integers in the ar…

题目链接: 传送门 Devu and Partitioning of the Array time limit per test:1 second     memory limit per test:256 megabytes Description Devu being a small kid, likes to play a lot, but he only likes to play with arrays. While playing he came up with an interes…

Destroying Roads time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output In some country there are exactly n cities and m bidirectional roads connecting the cities. Cities are numbered with intege…

B. Yet Another Array Partitioning Task time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An array bb is called to be a subarray of aa if it forms a continuous subsequence of aa , that is, if…

题解 非常容易想到的线段树, 还可以用并查集来. 还有一位大神用了$O(n)$ 就过了Orz 要判断是否能染色出输入给出的序列,必须满足两个条件: 1. 序列中必须存在一个$q$ 2. 两个相同的数$x$的中间不存在比 $ x$ 小的数 首先判断输入的数列中是否存在$q$, 若不存在$q$ 且没有 $a_i = 0$, 表示序列中一定没有$q$, 直接输出NO 若存在某个$a_i = 0$ , 将任意一个染成$q$即可 然后我们再查询两个相同的数$x$ 中是否存在比$x$ 小的数,用线段树来维护…

You are given an array of integers. Vasya can permute (change order) its integers. He wants to do it so that as many as possible integers will become on a place where a smaller integer used to stand. Help Vasya find the maximal number of such integer…

任意门:http://codeforces.com/contest/1114/problem/B B. Yet Another Array Partitioning Task time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output An array bb is called to be a subarray of aa if it f…