change,Ringo题目

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Lightoj 1231 - Coin Change (I) (裸裸的多重背包)

题目链接: Lightoj 1231 - Coin Change (I) 题目描述: 就是有n种硬币,每种硬币有两个属性(价值,数目).问用给定的硬币组成K面值,有多少种方案? 解题思路: 赤果果的多重背包,简单搞一下就好了.席八!烦烦烦.今天绝对是出门刷提前没看黄历,刚开始套了一个多重背包板子,蓝而跑出来的答案并不对,改来改去就错在细节的地方. #include <cmath> #include <cstdio> #include <cstring> #includ…

leetcode算法总结

算法思想二分查找贪心思想双指针排序快速选择堆排序桶排序搜索 BFS DFS Backtracking 分治动态规划分割整数矩阵路径斐波那契数列最长递增子序列最长公共子系列 0-1 背包数组区间字符串编辑其它问题数学素数最大公约数进制转换阶乘字符串加法减法相遇问题多数投票问题其它数据结构相关栈和队列哈希表字符串数组与矩阵 1-n 分布有序矩阵链表树递归层次遍历前中后序遍历 BST Trie 图位运算参考资料算法思想二…

状压dp大总结1 [洛谷]

前言状态压缩是一种$dp$里的暴力,但是非常优秀,状态的转移,方程的转移和定义都是状压$dp$的难点,本人在次总结状压dp的几个题型和例题,便于自己以后理解分析状态和定义方式状态压缩动态规划,就是我们俗称的状压$dp$,是利用计算机二进制的性质来描述状态的一种$dp$方式. 很多棋盘问题都运用到了状压,同时,状压也很经常和BFS及$dp$连用. 状压$dp$其实就是将状态压缩成2进制来保存其特征就是看起来有点像搜索,每个格子的状态只有$1$或$0$ ,是另一…

Change FZU - 2277 毒瘤啊毒瘤题目

There is a rooted tree with n nodes, number from 1-n. Root’s number is 1.Each node has a value ai. Initially all the node’s value is 0. We have q operations. There are two kinds of operations. 1 v x k : a[v]+=x , a[v’]+=x-k (v’ is child of v) , a[v’’…

LeetCode All in One 题目讲解汇总(持续更新中...)

终于将LeetCode的免费题刷完了,真是漫长的第一遍啊,估计很多题都忘的差不多了,这次开个题目汇总贴,并附上每道题目的解题连接,方便之后查阅吧~ 477 Total Hamming Distance 44.10% Meidum 475 Heaters 30.20% Easy 474 Ones and Zeroes 34.90% Meidum 473 Matchsticks to Square 31.80% Medium 472 Concatenated Words 29.20% Hard…

[LeetCode] Coin Change 硬币找零

You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins that you need to make up that amount. If that amount of money cannot be made up by any combination of the coins,…

1Z0-053 争议题目解析470

1Z0-053 争议题目解析470 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 470.Which NLS parameter can be used to change the default Oracle sort method from binary to linguistic for the SQL SELECT statement? A. NLS_LANG B. NLS_COMP C. NLS_SORT D. None of the above Answer: D…

1Z0-053 争议题目解析498

1Z0-053 争议题目解析498 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 498.The database Is configured in ARCHIVELOG mode. The database needs to be up 24 X 7. You want to perform user managed backup for the data files of the HR_DATA tablespace. To accomplish the task, yo…

1Z0-053 争议题目解析683

1Z0-053 争议题目解析683 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 683.Your production database it functional on the SHOST1 host. You are backing up the production database by using Recovery Manager (RMAN) with the recovery catalog. You want to replicate the product…

1Z0-053 争议题目解析704

1Z0-053 争议题目解析704 考试科目:1Z0-053 题库版本:V13.02 题库中原题为: 704.View the Exhibit and examine the data manipulation language (DML) operations that you performed on the NEWEMP table. Note that the first two updated are not listed by the Flashback Versions Query…

面试题目——《CC150》高等难题

面试题18.1:编写一个函数,将两个数字相加.不得使用+或其他算数运算符. package cc150.high; public class Add { public static void main(String[] args) { // TODO 自动生成的方法存根 } public int add(int a,int b){ //将两个数字相加,不得使用+或者其他算数运算符 if(b == 0) return a; int sum = a^b; //相加,但不进位 int carry =…

HDOJ 题目2474 String painter（区间DP）

String painter Time Limit: 5000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2520 Accepted Submission(s): 1134 Problem Description There are two strings A and B with equal length. Both strings are made up…

HDU 2277 Change the ball

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2277 Change the ball Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 694 Accepted Submission(s): 272 Problem Description Garfield has three pile…

UVA题目分类

题目 Volume 0. Getting Started 开始10055 - Hashmat the Brave Warrior 10071 - Back to High School Physics 10300 - Ecological Premium 458 - The Decoder 494 - Kindergarten Counting Game 414 - Machined Surfaces 490 - Rotating Sentences 445 - Marvelous Mazes…

SHOI2008 题目总结

感觉还是上海人出题水平高?这套题写得心旷神怡的...总之很难就是啦由于我实在不适应博客园这种排版和字体..所以我的文章可能会特别难看大家见谅..说不定回头开发一个支持全局LaTeX的博客也不错?2333 BZOJ1018 堵塞的交通: 题目大意:有一个2*n的矩阵,初始时没有边,每次可能会打通两个相邻的节点(相邻指曼哈顿距离为1)之间的无向道路或是拆毁两个相邻节点的道路,每次询问两个节点是否连通. 神奇的做法:使用动态树维护整个图的连通性!(这真的可写么?) 正确的做法:由于只有两排,使用一个…

HNOI2008题目总结

呜呼..NOI前一个月正式开始切BZOJ了……以后的题解可能不会像之前的零散风格了,一套题我会集中起来发,遇到一些需要展开总结的东西我会另开文章详细介绍. 用了一天的时间把HNOI2008这套题切了……感觉新知识好多啊……一定是我太弱了,各方面能力还都需要加强,尤其是DP啦推导啦神马的 BZOJ1004 Cards: 题目大意: 桌上有N张牌,将这N张牌染成sr张红色,sg张绿色和sb张蓝色,然后给出M种洗牌方式,可以通过洗牌得到的方案视作相同方案,问不同的染色方案数.输入中保证任何一种连续多次…

2013长沙网络赛H题Hypersphere (蛋疼的题目神似邀请赛A题)

Hypersphere Time Limit: 1 Second Memory Limit: 32768 KB In the world of k-dimension, there's a large hypersphere made by mysterious metal. People in the world of k-dimension are performing a ceremony to worship the goddess of dimension. They ar…

HOJ题目分类

各种杂题,水题,模拟,包括简单数论. 1001 A+B 1002 A+B+C 1009 Fat Cat 1010 The Angle 1011 Unix ls 1012 Decoding Task 1019 Grandpa's Other Estate 1034 Simple Arithmetics 1036 Complete the sequence! 1043 Maya Calendar 1054 Game Prediction 1057 Mileage Bank 1067 Rails 10…

UVA 674 Coin Change（dp）

UVA 674 Coin Change 解题报告题目链接:http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87730#problem/E 题目: Suppose there are 5 types of coins: 50-cent, 25-cent, 10-cent, 5-cent, and 1-cent. We want to make changes with these coins for a given amount o…

JSU省赛队员选拔赛个人赛1（Coin Change、Fibbonacci Number、Max Num、单词数、无限的路、叠筐）

JSU省赛队员选拔赛个人赛1 一.题目概述: A.Coin Change(暴力求解.动态规划) B.Fibbonacci Number(递推求解) C.Max Num(排序.比较) D.单词数(字符串比较.库函数运用) E.无限的路(平面几何) F.叠筐(规律输出) 二.解题报告: A.Coin Change 给一个钱的总金额,求出用100个以内的50分.25分.10分.5分.1分硬币拼成该金额的不同拼法. 直接暴力,打表什么的都是浮云.开始总觉得用暴力求解显得自己没风度,不够高端霸气上…

CF 332A Down the Hatch! 超级水题。。不过题目太长了

A. Down the Hatch! time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Everybody knows that the Berland citizens are keen on health, especially students. Berland students are so tough that all…

P3092 [USACO13NOV]没有找零No Change

题目描述 Farmer John is at the market to purchase supplies for his farm. He has in his pocket K coins (1 <= K <= 16), each with value in the range 1..100,000,000. FJ would like to make a sequence of N purchases (1 <= N <= 100,000), where the ith p…

[USACO13NOV]没有找零No Change [TPLY]

[USACO13NOV]没有找零No Change 题目链接 https://www.luogu.org/problemnew/show/3092 做题背景 FJ不是一个合格的消费者,不知法懂法用法,不会拿起法律的武器维护消费者权益做法本题涉及的知识点:状态压缩,动态规划,二分答案. 注意物品是依次购买首先是状态压缩: 压什么?我们注意到k<=16,那么就是压硬币使用集合. 然后是动态规划: 怎么设状态?设dp[i]表示我们选硬币集合i(状压)从一号物品开始最多能买的物品数. 怎么转移?从…

[LeetCode] Coin Change 2 硬币找零之二

You are given coins of different denominations and a total amount of money. Write a function to compute the number of combinations that make up that amount. You may assume that you have infinite number of each kind of coin. Note: You can assume that…

[LeetCode] Lemonade Change 买柠檬找零

At a lemonade stand, each lemonade costs $5. Customers are standing in a queue to buy from you, and order one at a time (in the order specified by bills). Each customer will only buy one lemonade and pay with either a $5, $10, or $20 bill. You must…

leetcode top 100 题目汇总

首先表达我对leetcode网站的感谢,与高校的OJ系统相比,leetcode上面的题目更贴近工作的需要,而且支持的语言广泛.对于一些比较困难的题目,可以从讨论区中学习别人的思路,这一点很方便. 经过一段时间的练习,我感觉自己的算法水平还是有很大的提升的.与学校开的算法导论的课程相比,我觉得实实在在的做题,比学习理论更符合我的认知方式.可能我属于那种脑子记不住,但是可以用“肌肉”去记忆的类型吧. 在做题的时候,我会尝试用感觉好玩的语言来写.如果把做题当成一种解谜游戏的话,那语言就是玩这个游戏选择…

F - Change FZU - 2277 （DFS序+线段树）

题目链接: F - Change FZU - 2277 题目大意: 题意: 给定一棵根为1, n个结点的树. 有q个操作,有两种不同的操作 (1) 1 v k x : a[v] += x, a[v '] += x – k(v '为v的儿子), a[v ' '] += x – 2 * k(v ' '是v '的儿子) ... ; (2) 2 v : 输出a[v] % (1e9 + 7); 具体思路:dfs序+线段树 a[v'']=a[v'']+x-k*(depth[v'']-depth[v])=a[…

OCM 学习练习题目

1:数据安装操作练习:考试题目 1: Creating a database & Server Configuration --[101]-- #创建数据库 1. Create the database #使用dbca创建一个PROD1数据库,包括Sample Schema,启用archivelog,没有EM. 1.1 Create a PROD1 database with dbca, including Sample Schema, enable archivelog, without EM…

Python题目练习（二）

1.如何实现对python列表去重,并保持原来顺序 li = [1,2,5,3,1,6,3,8,0,3,2,4] l = [] for i in li: if i not in l: l.append(i) print(l) 方法一 li = [1,2,5,3,1,6,3,8,0,3,2,4] l = list(set(li)) l.sort(key=lambda i:li.index(i)) print(l) # 先去重,再按照li的索引进行排序方法二 li = [1,2,5,3,1,6,3…

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