http://acm.hdu.edu.cn/game/entry/problem/show.php?chapterid=2&sectionid=1&problemid=2 #include <stdio.h> #include <stdlib.h> #include <math.h> /* run this program using the console pauser or add your own getch, system("pause…

[题目大意] 给n个数判断有几个素数.(每个数<=2^32) 注意多组数据 [题解] 用Rabin_Miller测试跑得飞快... /************* HDU 2138 by chty 2016.11.5 *************/ #include<iostream> #include<cstdio> #include<cstring> #include<cstdlib> #include<ctime> #include<…

[BZOJ1662][Usaco2006 Nov]Round Numbers 圆环数 Description 正如你所知,奶牛们没有手指以至于不能玩"石头剪刀布"来任意地决定例如谁先挤奶的顺序.她们甚至也不能通过仍硬币的方式. 所以她们通过"round number"竞赛的方式.第一头牛选取一个整数,小于20亿.第二头牛也这样选取一个整数.如果这两个数都是 "round numbers",那么第一头牛获胜,否则第二头牛获胜. 如果一个正整数N的二…

按 被中科大软件学院二年级研究生 HCOONa 骂为“误人子弟”之后(见:<中科大的那位,敢更不要脸点么?> ),继续“误人子弟”. 问题: 题目:(感谢 王爱学志 网友对题目给出的翻译)     排名 题目要求:     程序运行时间要不大于1000ms,程序的内存大小不大于32756k.     向审题系统提交总时间是2843秒,审题系统接受的提交时间是860秒. 题目描述:     Jackson想知道他在班级中的排名.教授已经公布班级中人的     学号和分数的列表.计算Jackson…

[CF653G]Move by Prime 题意:给你一个长度为n的数列$a_i$,你可以进行任意次操作:将其中一个数乘上或者除以一个质数.使得最终所有数相同,并使得操作数尽可能小.现在我们想要知道$a_i$的所有子序列的操作数之和是多少.答案对$10^9+7$取模. $n,a_i\le 3\times 10^5$ 题解:显然要对每个质数分别处理.而对于每个质数,最终一定是让所有数都变成该序列的中位数最优.因此如果所有数的次数分别是$k_1,k_2...k_n$,则如果i在中位数左边,则贡献为$…

[LeetCode]165. Compare Version Numbers 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/compare-version-numbers/description/ 题目描述: Compare two version numbers version1 and vers…

[链接] 我是链接,点我呀:) [题意] f[i]表示在x[]中有多少个数字是i的倍数 让你求出sum(f[i]) li<=i<=ri 且i是质数 [题解] 做筛法求素数的时候顺便把素数i在x[]中的倍数的个数求出来就好 前缀和 输出即可 [代码] import java.io.*; import java.util.*; public class Main { static InputReader in; static PrintWriter out; public static void…

[前言] 很久没有纯粹的写写小代码,偶然想起要回炉再来,就去HDU随便选了个最基础的题,也不记得曾经AC过:最后吃惊的发现,思路完全不一样了,代码风格啥的也有不小的变化.希望是成长了一点点吧.后面定期去做做题.保持青春的活力! 1.青年回炉 Problem : 1008 ( Elevator )   Run ID Submit Time Judge Status Pro.ID Exe.Time Exe.Memory Code Len. Language Author 9098607 2013-0…

0. 前言打了两年的百度之星,都没进决赛.我最大的感受就是还是太弱,总结起来就是:人弱就要多做题,人傻就要多做题.题目还是按照分类做可能效果比较好,因此,就有了做几个系列的计划.这是系列中的第一个,解决OJ中有关魔方的问题. 1. 概述魔方大概会涉及两类算法:搜索和模拟.这里的搜索方式一般是双广或者bfs+剪枝,因为双广基本上就可以把题目都解了,所以我也没去考虑A*.我自身不会玩儿魔方,因此剪枝策略也就两种,不过效果还是很好的.模拟就相对简单,仅需要了解几种旋转的方式基本上是可解.搜索过程中存在…

不定时更新博客,该博客仅仅是一篇关于最短路的题集,题目顺序随机. 算法思想什么的,我就随便说(复)说(制)咯: Dijkstra算法:以起始点为中心向外层层扩展,直到扩展到终点为止.有贪心的意思. 大部分题用Dij+队列优化都能解决..但有负权边不行哦. Bellman-Ford:反复对边集E中的每条边进行松弛操作. 求含负权图(有负环输出错误提示)的单源最短路径,效率很低,至于对多余松弛的优化就是设置个标记,还是很慢,不如写SPFA. 判断负环:在每次松弛时把每条边都更新一下,若在n-1次松弛…

/*打表把素数能组合的数先设置成相应的位数*/ /* if n equals two and n is No.1 position of prime factors  so four position of prime factors is no.1,as well*/ /* although two can combined six but three also can combined six */ /* and three position of prime factors is two…

题目:http://acm.acmcoder.com/showproblem.php?pid=2089 杭州人称那些傻乎乎粘嗒嗒的人为62(音:laoer).杭州交通管理局经常会扩充一些的士车牌照,新近出来一个好消息,以后上牌照,不再含有不吉利的数字了,这样一来,就可以消除个别的士司机和乘客的心理障碍,更安全地服务大众.不吉利的数字为所有含有4或62的号码.例如:62315 73418 88914都属于不吉利号码.但是,61152虽然含有6和2,但不是62连号,所以不属于不吉利数字之列.你的任务…

八皇后问题,是一个古老而著名的问题,是回溯算法的典型例题. 其解决办法和我以前发过的[算法之美—Fire Net:www.cnblogs.com/lcw/p/3159414.html]类似 题目:在8X8格的国际象棋上摆放八个皇后,使其不能互相攻击,即任意两个皇后都不能处于同一行.同一列或同一斜线上,问有多少种摆法. #include <stdio.h> ; //全局变量,统计所有解法 ] ) //判断是否存在危险 { , flag2=, flag3=, flag4=, flag5=; //…

Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. 思路: 先找前面二进制相同的位,后面不相同的位相与一定为0. 比如: 1111001 1110011 从0011 - 1001 中间一定会经…

经验: cout 特别慢 如果要求速度 全部用 printf !!! 在学习线段树 内容来自:http://www.cnblogs.com/shuaiwhu/archive/2012/04/22/2464583.html 作者Microgoogle 线段树在一些acm题目中经常见到,这种数据结构主要应用在计算几何和地理信息系统中.下图就为一个线段树: (PS:可能你见过线段树的不同表示方式,但是都大同小异,根据自己的需要来建就行.) 1.线段树基本性质和操作 线段树是一棵二叉树,记为T(a, b…

Compare two version numbers version1 and version2.If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0. You may assume that the version strings are non-empty and contain only digits and the . character.The . characte…

problem 448. Find All Numbers Disappeared in an Array solution: class Solution { public: vector<int> findDisappearedNumbers(vector<int>& nums) { vector<int> res; ; i<nums.size(); i++) { ; nums[tmp] = nums[tmp]> ? -nums[tmp] : n…

题目概述:Jugs In the movie "Die Hard 3", Bruce Willis and Samuel L. Jackson were confronted with the following puzzle. They were given a 3-gallon jug and a 5-gallon jug and were asked to fill the 5-gallon jug with exactly 4 gallons. This problem gen…

题目概述:Crashing Balloon On every  June 1st, the Children's Day, there will be a game named "crashing balloon" on  TV.   The rule is very simple.  On the ground there are 100 labeled balloons,  with the numbers 1 to 100. After the referee shouts &q…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2211 杀人游戏 Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 3624    Accepted Submission(s): 1182 Problem Description 不知道你是否玩过杀人游戏,这里的杀人游戏可没有法官,警察之类的人…

You are given two non-empty linked lists representing two non-negative integers. The most significant digit comes first and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two numbers…

//make up a table of prime factors #include <stdio.h> #include <stdlib.h> #define MAX 32769 /* run this program using the console pauser or add your own getch, system("pause") or input loop */ int main(int argc, char *argv[]) { int P…

http://acm.hdu.edu.cn/game/entry/problem/show.php?chapterid=2&sectionid=1&problemid=1 #include <stdio.h> #include <stdlib.h> /* run this program using the console pauser or add your own getch, system("pause") or input loop */…

题目: You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. You may assume the two num…

题目: You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return it as a linked list. Input: (2 -> 4 -> 3) + (5 -> 6 -&…

Old Calculator时间限制:1000 ms  |  内存限制:65535 KB 难度:1描述 szhhck have an old calculator bought 5 years ago.he find the old machine can just calculate expressions like this  : A-B.A+B.A*B.A/B.A%B. because it is too old and long time not use,the old machine…

A+B for Input-Output Practice (I)Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 62478    Accepted Submission(s): 35144 Problem DescriptionYour task is to Calculate a + b.Too easy?! Of course! I…

Find a multipleTime Limit: 1000MS  Memory Limit: 65536K Total Submissions: 4988  Accepted: 2159  Special Judge Description The input contains N natural (i.e. positive integer) numbers ( N <= 10000 ). Each of that numbers is not greater than 15000. Th…

Grandpa is FamousTime Limit: 2000MS  Memory Limit: 30000K Total Submissions: 7256  Accepted: 3670 Description The whole family was excited by the news. Everyone knew grandpa had been an extremely good bridge player for decades, but when it was announ…

problem 728. Self Dividing Numbers solution1: 使用string类型来表示每位上的数字: class Solution { public: vector<int> selfDividingNumbers(int left, int right) { vector<int> res; for (int i=left; i<=right; ++i) { bool flag = isSDN(i); if(flag) res.push_ba…