题意: 给一个正整数N,找最小的M,使得N可以整除M,且N/M是质数. 数据范围: There are multiple test cases (no more than 1,000). Each case contains only one positive integer N.N≤1,000,000,000.Number of cases with N>1,000,000 is no more than 100. 思路: N=M*prime     故必有M或prime小于等于sqrt(N)…

数论题,本质是求出n的最大质因子 #include<time.h> #include <cstdio> #include <iostream> #include<algorithm> #include<math.h> #include <string.h> #include<vector> #include<queue> using namespace std; int main() { int n,t; wh…

Final Pan's prime numbers Time Limit: 1000MS   Memory Limit: 65535KB   64bit IO Format: %lld & %llu Submit Status Description Final Pan likes prime numbers very much. One day, he want to find the super prime numbers.A prime numbers $n$($n$>4) is a…

Alexandra and Prime Numbers Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1658    Accepted Submission(s): 565 Problem Description Alexandra has a little brother. He is new to programming. One…

HDU 2096 /* HDU 2096 小明A+B --- 水题 */ #include <cstdio> int main() { #ifdef _LOCAL freopen("D:\\input.txt", "r", stdin); #endif int a, b, c, n; scanf("%d", &n); while (n--){ scanf("%d%d", &a, &b); a…

POJ.2739 Sum of Consecutive Prime Numbers(水) 代码总览 #include <cstdio> #include <cstring> #include <vector> #include <cmath> #define nmax 10005 using namespace std; int prime[nmax],n; vector<int> vprime; void init() { memset(pri…

How many prime numbers Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 12955    Accepted Submission(s): 4490 Problem Description   Give you a lot of positive integers, just to find out how many…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=2602 水题啊水题 还给我WA了好多次 因为我在j<w[i]的时候状态没有下传.. #include <cstdio> #include <algorithm> #include <cstring> using namespace std; typedef long long LL; typedef pair<int,int> PII; #define PB…

Problem Description Give you a lot of positive integers, just to find out how many prime numbers there are. Input There are a lot of cases. In each case, there is an integer N representing the number of integers to find. Each integer won't exceed 32-…

A. Home Numbers 题目连接: http://www.codeforces.com/contest/638/problem/A Description The main street of Berland is a straight line with n houses built along it (n is an even number). The houses are located at both sides of the street. The houses with od…

Just a Numble Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2107    Accepted Submission(s): 987 Problem Description Now give you two integers n m, you just tell me the m-th number after radix…

折线分割平面 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13355    Accepted Submission(s): 9247 Problem Description 我们看到过很多直线分割平面的题目,今天的这个题目稍微有些变化,我们要求的是n条折线分割平面的最大数目.比如,一条折线可以将平面分成两部分,两条折线最多可以将平面分…

一只小蜜蜂... Time Limit: / MS (Java/Others) Memory Limit: / K (Java/Others) Total Submission(s): Accepted Submission(s): Problem Description 有一只经过训练的蜜蜂只能爬向右侧相邻的蜂房,不能反向爬行.请编程计算蜜蜂从蜂房a爬到蜂房b的可能路线数. 其中,蜂房的结构如下所示. Input 输入数据的第一行是一个整数N,表示测试实例的个数,然后是N 行数据,每行包含两个…

Children's Day Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 158    Accepted Submission(s): 72 Problem Description Today is Children's Day. Some children ask you to output a big letter 'N'. 'N…

18岁生日 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 16784    Accepted Submission(s): 5317 Problem Description Gardon的18岁生日就要到了,他当然很开心,可是他突然想到一个问题,是不是每个人从出生开始,到达18岁生日时所经过的天数都是一样的呢?似乎并不全都是这样,所以他…

查找最大元素 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25436    Accepted Submission(s): 14000 Problem Description 对于输入的每个字符串,查找其中的最大字母,在该字母后面插入字符串“(max)”.   Input 输入数据包括多个测试实例,每个实例由一行长度不超过100的字符…

6300.Triangle Partition 这个题就是输出组成三角形的点的下标. 因为任意三点不共线,所以任意三点就可以组成三角形,直接排个序然后输出就可以了. 讲道理,没看懂官方题解说的啥... 官方题解: 求个凸包,然后选择凸包一条边AB,然后找个和AB夹角最小的点C,把ABC当做一个三角形删掉即可.这样做个n次,显然这样求出来的三角形们是合法的. 代码: //1003-6300-三角形水题 #include<iostream> #include<cstdio> #incl…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5108 题目意思:给出一个数正整数 N,N <= 1e9,现在需要找出一个最少的正整数 M,使得 N/M 是素数.如果找不到就输出0. 一开始有想过将所有 <= 1e9 的素数求出来的,不过绝对超时就放弃了:然后就开始从题目中挖掘简便的处理方法.受到求素数的方法启发,枚举的因子 i 如果在 i * i <= N 之内都没有找到符合条件的素数,那么那些 > N 的因子就更不可能了.于是时间…

Dylans loves numbers Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5272 Description Dylans是谁?你可以在 UOJ 和 Codeforces上看到他.在BestCoder里,他有另外一个ID:s1451900.今天的题目都和他有关哦.Dylans得到了一个数N.他想知道N的二进制中有几组1.如果两个1之间有若干个(至少一个)0…

Lweb and String 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5842 Description Lweb has a string S. Oneday, he decided to transform this string to a new sequence. You need help him determine this transformation to get a sequence which has the longe…

Clarke and five-pointed star Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5563 Description Clarke is a patient with multiple personality disorder. One day, Clarke turned into a learner of geometric. When he d…

floyd解法 今天初看dijkstra,先拿这两题练手,其他变形题还是不是很懂. 模版题,纯练打字... HDU 1874: #include <cstdio> #define MAXN 200 #define INF 0xfffff int n; int Edge[MAXN][MAXN]; int s[MAXN]; int dist[MAXN]; int path[MAXN]; void Dijkstra(int v0) { int i, j, k; for (i = 0; i <…

题目:http://acm.hdu.edu.cn/showproblem.php?pid=2275 这个题比较简单,所以就没有测试样例提供给大家,基本把题目的样例过了就可以了 题目大意 给你一串操作,“Push  x”为添加元素x : “Pop  x”为:在集合中找到一个不大于x的最大数,输出并删除,没有的话,输出“No Element!” 最后留一个空行 存储结构 multiset,一种允许有重复元素的set 思路 用set自带的upper_bound()函数找到大于x的位置,输出其前一个位置…

A. Johny Likes Numbers 题目连接: http://www.codeforces.com/contest/678/problem/A Description Johny likes numbers n and k very much. Now Johny wants to find the smallest integer x greater than n, so it is divisible by the number k. Input The only line con…

变形课 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/65536 K (Java/Others)Total Submission(s): 11935    Accepted Submission(s): 4418 Problem Description 呃......变形课上Harry碰到了一点小麻烦,因为他并不像Hermione那样能够记住所有的咒语而随意的将一个棒球变成刺猬什么的,但是他发现了变形咒语的一个统一规…

http://acm.hdu.edu.cn/showproblem.php?pid=5078 现场最水的一道题 连排序都不用,由于说了ti<ti+1 //#pragma comment(linker, "/STACK:102400000,102400000") #include <cstdio> #include <cstring> #include <algorithm> #include <string> #include &l…

http://acm.hdu.edu.cn/showproblem.php?pid=1408 题目: 挂盐水的时候,如果滴起来有规律,先是滴一滴,停一下:然后滴二滴,停一下:再滴三滴,停一下...,现在有一个问题:这瓶盐水一共有VUL毫升,每一滴是D毫升,每一滴的速度是一秒(假设最后一滴不到D毫升,则花费的时间也算一秒),停一下的时间也是一秒这瓶水什么时候能挂完呢? 一开始Output Limit Exceeded 第一次遇到.... 好吧,不知道是什么原因,看了下别人的..人家是double我…

题意:看一个字符串中是否包含顺序的  w  y  h ,字符之间可以有其他字符,并且如果有多个连续的vv,则可以看做一个w 比较水,直接看代码 #include<cstdio> #include<iostream> #include<algorithm> #include<cstring> #include<cmath> #include<queue> #include<map> using namespace std;…

HDU 2083 简易版之最短距离 /* HDU 2083 简易版之最短距离 */ #include <cstdio> #include <algorithm> using namespace std; ; int a[maxn]; int main() { #ifdef _LOCAL freopen("D:\\input.txt", "r", stdin); #endif int t; scanf("%d", &…

一个公司的职员是分级制度的,所有员工刚好是一个树形结构,现在公司要举办一个聚会,邀请部分职员来参加. 要求: 1.为了聚会有趣,若邀请了一个职员,则该职员的直接上级(即父节点)和直接下级(即儿子节点)都不能被邀请 2.每一个员工都有一个兴奋值,在满足1的条件下,要使得邀请来的员工的兴奋值最高 输出最高的兴奋值. 简单的树形DP dp[i][1]:表示以i为根的子树,邀请节点i的最大兴奋值 dp[i][0]:表示以i为根的子树,不邀请节点i的最大兴奋值 先根据入度找出整棵树的根节点, 然后一次DF…