Uva 11729  Commando War (简单贪心) There is a war and it doesn't look very promising for your country. Now it's time to act. You have a commando squad at your disposal and planning an ambush on an important enemy camp located nearby. You have N soldiers…

题目传送门 /* 贪心:按照执行时间长的优先来排序 */ #include <cstdio> #include <algorithm> #include <iostream> #include <cstring> #include <string> #include <cmath> using namespace std; ; const int INF = 0x3f3f3f3f; struct Node { int b, j; bo…

1446. [Commando War,Uva 11729]突击战 ★   输入文件:commando.in   输出文件:commando.out   简单对比时间限制:1 s   内存限制:64 MB [题目描述] 你有n个部下,每个部下需要完成一项任务.第i个部下需要你花Bi分钟交代任务,然后他会立刻独立地,无间断的执行Ji分钟后完成任务.你需要交代任务的顺序,使得所有的任务尽早执行完毕.注意,不能同时给2个部下交代任务,但是部下可以同时执行各自的任务. [输入格式] 输入数据包括多组数据…

"Waiting for orders we held in the wood, word from the front never came By evening the sound of the gunfire was miles away Ah softly we moved through the shadows, slip away through the trees Crossing their lines in the mists in the fields on our hand…

http://vjudge.net/problem/UVA-11729 There is a war and it doesn't look very promising for your country. Now it's time to act. You have a commando squad at your disposal and planning an ambush on an important enemy camp located nearby. You have N sold…

There is a war and it doesn't look very promising for your country. Now it's time to act. You have a commando squad at your disposal and planning an ambush on an important enemy camp located nearby. You have N soldiers in your squad. In your master-p…

[题目翻译]: 题目分析:因为任务是可以并行的执行,所以直觉上是花费时间长的任务优先去部署.但是这到题目还给你交待任务的时间,所以容易让人想多了. 不管有没有交待任务的时间,对于任务x和y,只可能有两种情况.x在y之前结束,和x在y之后结束.这里讨论x在y之前完成. 未交换x和y的位置时,完成时间为:B[x] + B[y] + J[y] 交换h和y位置之后,完成时间为:B[y] + B[x] + J[x] 如果J[y] 大于J[x],那么交换后,时间变短了,所以应该将y放在x之前执行.另一种情况…

你有 n 个部下,每个部下需要完成一个任务.第 i 个部下需要你花 Bi 分钟交待任务,然后他会立刻独立地.无间断地执行 Ji 分钟后完成任务.你需要选择交待任务的顺序,使得所有任务尽早执行完毕(即最后一个执行完的任务尽早结束).注意,不能同时给两个部下交待任务,但部下们可以同时执行他们各自的任务. 既然是要尽早完成任务,当然执行时间长的先交待,先执行.所以对所有数据按执行时间从大到小的顺序进行排序,然后开始处理,通过更新最晚的时间来得到最终结果. 简单的贪心,附上AC代码: 1: #inclu…

Commando War There is a war and it doesn't look very promising for your country. Now it's time to act. You have a commando squad at your disposal and planning an ambush on an important enemy camp located nearby. You have N soldiers in your squad. In…

思路:就是把J大的放在前面.为什么这样贪心呢? 看看这个图 #include<iostream> #include<algorithm> #include<vector> using namespace std; struct node{ int x, y; bool operator < (const node &b) const{ return y>a.y; } }; int n, t, x, y; int main(){ while(cin&g…

https://vjudge.net/problem/UVA-11729 题意:有n个部下,每个部下需要完成一项任务.第i个部下需要你话B分钟交代任务,然后立刻执行J分钟完成任务.安排交代任务顺序并计算出所有任务完成的最少时间. 思路:贪心. 把执行任务长的先交代了. 每个任务都有各自的开始执行时间,也就是当这个任务交代完时,它就开始执行任务.接下来计算出完成任务时的时间,每次更新最晚的任务完成时间即可. #include<iostream> #include<algorithm>…

 例2:假设当前小光有n个部下,每个部下需要完成一项任务.第i个部下需要小光花Bi分钟交代任务,然后他会立刻独立地.无间断地执行Ji分钟后完成任务.小光需要选择交代任务的顺序,使得所有任务尽早执行完毕(即最后一个执行完的任务应尽早结束).注意,不能同时给两个部下交代任务,但部下们可以同时执行他们各自的任务.Input 输入包含多组数据,每组数据的第一行为部下的个数n(1<=n<=1000):以下n行,每行两个正整数B和J(1<=B<=10000,1<=J<=10000)…

题目链接:http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=28436 思路:任务从开始时就不停执行,与其他任务毫无关联,当然是执行时间越长的任务越早执行好了 #include <iostream> #include <algorithm> #include <cstdio> #define RPE(i,n) for(int i=0;i<n;i++) using namespace std; ;…

题意:有n个部下,交待每个部下完成他相应的任务需要bi的时间,然后完成这项任务需要ji的时间, 选择交待任务的顺序,使得总的花费的时间最少 因为不管怎么样,交待所需要的n*bi的时间都是要花费的, 然后就让完成任务需要的时间长的人先做,就将j按降序排,更新每完成一个人的任务所花费的时间 #include<iostream> #include<cstdio> #include<cstring> #include <cmath> #include<stac…

UVA 11292 The Dragon of Loowater 题意 给n个头,m个骑士,骑士有能力值x,代表他可以砍掉一个直径不超过x的头,并且佣金为x,求要砍掉所有的头,需要的最少佣金是多少. 类型 贪心 难度 简单 题解 贪心,对n个头进行排序,m个骑士进行排序,对当前的最小x的骑士,如果他可以砍掉最小直径的头,那么雇佣他(显然不存在更好的选择),否则,看下一个骑士是否可以砍掉当前最小直径的未被砍掉的头. UVA 11729 Commando War 题意 给n个部下,每个需要完成一个任…

1038 Recover the Smallest Number (30 分)   Given a collection of number segments, you are supposed to recover the smallest number from them. For example, given { 32, 321, 3214, 0229, 87 }, we can recover many numbers such like 32-321-3214-0229-87 or 0…

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UVA - 10564 Paths through the Hourglass 题意: 要求从第一层走到最下面一层,只能往左下或右下走 问有多少条路径之和刚好等于S? 如果有的话,输出字典序最小的路径. f[i][j][k]从下往上到第i层第j个和为k的方案数 上下转移不一样,分开处理 没必要判断走出沙漏 打印方案倒着找下去行了,尽量往左走   沙茶的忘注释掉文件WA好多次   #include <iostream> #include <cstdio> #include <a…

UVA - 11404 Palindromic Subsequence 题意:一个字符串,删去0个或多个字符,输出字典序最小且最长的回文字符串 不要求路径区间DP都可以做 然而要字典序最小 倒过来求LCS,转移同时维护f[i][j].s为当前状态字典序最小最优解 f[n][n].s的前半部分一定是回文串的前半部分(想想就行了) 当s的长度为奇时要多输出一个(因为这样长度+1,并且字典序保证最小(如axyzb  bzyxa,就是axb|||不全是回文串的原因是后半部分的字典序回文串可能不是最小,多…

POJ3869 Headshot 题意:给出左轮手枪的子弹序列,打了一枪没子弹,要使下一枪也没子弹概率最大应该rotate还是shoot 条件概率,|00|/(|00|+|01|)和|0|/n谁大的问题 |00|+|01|=|0| 注意序列是环形 // // main.cpp // poj3869 // // Created by Candy on 25/10/2016. // Copyright © 2016 Candy. All rights reserved. // #include <i…

UVA - 11538 Chess Queen 题意:n*m放置两个互相攻击的后的方案数 分开讨论行 列 两条对角线 一个求和式 可以化简后计算 // // main.cpp // uva11538 // // Created by Candy on 24/10/2016. // Copyright © 2016 Candy. All rights reserved. // #include <iostream> #include <cstdio> #include <cst…

UVA - 11388 GCD LCM 题意:输入g和l,找到a和b,gcd(a,b)=g,lacm(a,b)=l,a<b且a最小 g不能整除l时无解,否则一定g,l最小 #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> using namespace std; typedef long long ll…

UVA - 1625 Color Length   白书 很明显f[i][j]表示第一个取到i第二个取到j的代价 问题在于代价的计算,并不知道每种颜色的开始和结束   和模拟赛那道环形DP很想,计算这次转移会给其他的元素带来的代价,也就是转移前已经出现但还没结束的元素都会代价+1   预处理每种颜色在两个序列中出现的位置bg[i][0/1]和ed[i][0/1], 计算f[i][j]时同时计算w[i][j]为(i,j)这个状态已经出现还没结束的个数 注意bg要先初始化为INF,计算w: if(b…

UVA - 10375 Choose and divide Choose and divide Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4053   Accepted: 1318 Description The binomial coefficient C(m,n) is defined as m! C(m,n) = -------- n!(m-n)! Given four natural numbers p, q…

UVA - 11584 Partitioning by Palindromes We say a sequence of char- acters is a palindrome if it is the same written forwards and backwards. For example, ‘racecar’ is a palindrome, but ‘fastcar’ is not. A partition of a sequence of characters is a lis…

UVA - 1025 A Spy in the Metro Secret agent Maria was sent to Algorithms City to carry out an especially dangerous mission. After several thrilling events we find her in the first station of Algorithms City Metro, examining the time table. The Algorit…

UVA - 11134 Fabled Rooks We would like to place n rooks, 1 ≤ n ≤ 5000, on a n × n board subject to the following restrictions The i-th rook can only be placed within the rectan- gle given by its left-upper corner (xli,yli) and its right- lower corner…

UVA - 11987 Almost Union-Find I hope you know the beautiful Union-Find structure. In this problem, you’re to implement something similar, but not identical. The data structure you need to write is also a collection of disjoint sets, supporting 3 oper…

题意: 给一段字符串成段染色,问染成目标串最少次数. SOL: 区间DP... DP[i][j]表示从i染到j最小代价 转移:dp[i][j]=min(dp[i][j],dp[i+1][k]+dp[k+1][j]); CODE: BZ: /*================================================================= # Created time: 2016-03-28 21:10 # Filename: uva4394.cpp # Desc…

http://uva.onlinejudge.org/index.php?option=com_onlinejudge&Itemid=8&page=show_problem&problem=83 147 - Dollars Time limit: 3.000 seconds Dollars New Zealand currency consists of $100, $50, $20, $10, and $5 notes and $2, $1, 50c, 20c, 10c and…