1046. Shortest Distance (20)

时间限制
100 ms
内存限制
65536 kB
代码长度限制
16000 B
判题程序
Standard
作者
CHEN, Yue

The task is really simple: given N exits on a highway which forms a simple cycle, you are supposed to tell the shortest distance between any pair of exits.

Input Specification:

Each input file contains one test case. For each case, the first line contains an integer N (in [3, 105]), followed by N integer distances D1 D2 ... DN, where Di is the distance between the i-th and the (i+1)-st exits, and DN is between the N-th and the 1st exits. All the numbers in a line are separated by a space. The second line gives a positive integer M (<=104), with M lines follow, each contains a pair of exit numbers, provided that the exits are numbered from 1 to N. It is guaranteed that the total round trip distance is no more than 107.

Output Specification:

For each test case, print your results in M lines, each contains the shortest distance between the corresponding given pair of exits.

Sample Input:

5 1 2 4 14 9
3
1 3
2 5
4 1

Sample Output:

3
10
7 思路 1.直接用累加求和,结果最后一项测试用例超时。
2.开一个二维数组暴力枚举出所有可能的情况,检测时直接输出对应情况,结果内存超了(最坏情况数组大小100001 * 100001)。
3.保存每一个目标点到起始点的road[i],那么任意两个点s,e的距离可以通过road[s]-road[e]计算出来,而不用再去一步步累加,所以不会超时。而且这种解决方案最坏情况开辟的数组大小为100001,不会超内存。 代码
#include<iostream>
#include<vector>
#include<math.h>
using namespace std; int main()
{
int N;
while(cin >> N)
{
vector<int> road(N + ,);
int sum = ;
for(int i = ;i <= N;i++)
{
int value;
cin >> value;
road[i + ] = road[i] + value;
sum += value;
}
int M;
cin >> M;
while(M--)
{
int s,e;
cin >> s >> e;
int path = abs(road[s] - road[e]);
cout << min(path,sum - path) << endl;
}
}
}

PAT1046: Shortest Distance的更多相关文章

  1. pat1046. Shortest Distance (20)

    1046. Shortest Distance (20) 时间限制 100 ms 内存限制 65536 kB 代码长度限制 16000 B 判题程序 Standard 作者 CHEN, Yue The ...

  2. [CareerCup] 18.5 Shortest Distance between Two Words 两单词间的最短距离

    18.5 You have a large text file containing words. Given any two words, find the shortest distance (i ...

  3. [Locked] Shortest Distance from All Buildings

    Shortest Distance from All Buildings You want to build a house on an empty land which reaches all bu ...

  4. maximum shortest distance

    maximum shortest distance Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/O ...

  5. [Swift]LeetCode821. 字符的最短距离 | Shortest Distance to a Character

    Given a string S and a character C, return an array of integers representing the shortest distance f ...

  6. LeetCode 613. Shortest Distance in a Line

    Table point holds the x coordinate of some points on x-axis in a plane, which are all integers. Writ ...

  7. [LeetCode] Shortest Distance to a Character 到字符的最短距离

    Given a string S and a character C, return an array of integers representing the shortest distance f ...

  8. PAT A1046 Shortest Distance

    PAT A1046 Shortest Distance 标签(空格分隔): PAT TIPS: 最后一个数据点可能会超时 #include <cstdio> #include <al ...

  9. [Solution] 821. Shortest Distance to a Character

    Difficulty: Easy Problem Given a string S and a character C, return an array of integers representin ...

随机推荐

  1. Linux下ipconfig分析及C语言实现

    在linux下使用ifconfigl命令能很方便的查看网卡与网线是否连通,运行ifconfig eth0命令大致输出如下: # ifconfig eth0 eth0 Link encap:Ethern ...

  2. 【翻译】了解ASP.NET MVC中的Ajax助手

    原文:Understanding AJAX Helpers in ASP.NET MVC 作者: Shailendra Chauhan works as Software Analyst at rep ...

  3. saiku中文维度,补充说明

    saiku在筛选中文维度 会出现浏览器白屏 停止响应的现象,经过跟踪源代码,分析原来在linux 操作系统中 数据库读取的中文和界面选取的编码是不一致的 解决方法, classes\saiku-dat ...

  4. 什么是网络套接字(Socket)?

    什么是网络套接字(Socket)?一时还真不好回答,而且网络上也有各种解释,莫衷一是.下文将以本人所查阅到的资料来说明一下什么是Socket. Socket定义 Socket在维基百科的定义: A n ...

  5. cocos2d-x action执行完毕的回调

    cocos2d-x action执行完毕的回调 MySprite::createOne() { .... //  MUST add to sheet firstly        spriteShee ...

  6. 【线性代数】标准正交矩阵与Gram-Schmidt正交化

    1.标准正交矩阵 假设矩阵Q有列向量q1,q2,...,qn表示,且其列向量满足下式: 则 若Q为方阵,由上面的式子则有 我们举例说明上述概念: 2.标准正交矩阵的好处     上面我们介绍了标准正交 ...

  7. OpenCV——RGB三通道分离

    opencv 和 matlab 在处理彩色图像的时候,通道的存储顺序是不同的. matlab 的排列顺序是R,G,B: 而在opencv中,排列顺序是B,G,R. 下面通过一个小程序看看opencv中 ...

  8. linux下利用ruby做系统备份与还原

    啥都不说了,都在代码里 :) #!/usr/bin/ruby BAK_PATH = "/media/backup.tar.xz" def to_backup exclude_fil ...

  9. 你真的知道.NET Framework中的阻塞队列BlockingCollection的妙用吗?

    BlockingCollection集合是一个拥有阻塞功能的集合,它就是完成了经典生产者消费者的算法功能.一般情况下,我们可以基于 生产者 - 消费者模式来实现并发.BlockingCollectio ...

  10. c#实例化继承类,必须对被继承类的程序集做引用

    0x00 问题 类型“Model.NewModel”在未被引用的程序集中定义.必须添加对程序集“Model, Version=1.0.0.0, Culture=neutral, PublicKeyTo ...