Rebuild Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 521    Accepted Submission(s): 125 Problem Description Archaeologists find ruins of Ancient ACM Civilization, and they want to rebuild i…

Pagodas Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 70    Accepted Submission(s): 62 Problem Description n pagodas were standing erect in Hong Jue Si between the Niushou Mountain and the Yun…

Bazinga Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 214    Accepted Submission(s): 89 Problem Description Ladies and gentlemen, please sit up straight.Don't tilt your head. I'm serious.For n…

http://acm.hdu.edu.cn/showproblem.php?pid=5441 题目大意是给一个n个城市(点)m条路线(边)的双向的路线图,每条路线有时间值(带权图),然后q个询问,每个询问一个时间值 求不大于这个时间的可以连通的城市有多少种连法 比如样例中第一个询问6000,不大于6000时间值的连通城市有3,5.所以有3-->5,5-->3两种 第二个询问10000,符合条件的连通的城市有2,3,5,所以有2-->3,3-->2,2-->5,5-->2…

n个结点,m条边,权值是 从u到v所花的时间 ,每次询问会给一个时间,权值比 询问值小的边就可以走 从u到v 和从v到u算不同的两次 输出有多少种不同的走法(大概是这个意思吧)先把边的权值 从小到大排序 询问值也按从小到大排序num记录集合里元素的个数每合并两个集合 ans增加 2*num[u]*num[v] Sample Input15 5 3 //n w q2 3 63341 5 157243 5 57054 3 123821 3 2172660001000013000 Sample Out…

把一个字符串分成N个字符串 每个字符串长度为m Sample Input12 5 // n mklmbbileay Sample Outputklmbbileay # include <iostream> # include <cstdio> # include <cstring> # include <algorithm> # include <string> # include <cmath> # include <queu…

2015 ACM/ICPC 长春现场赛 E题 三分. 如果节点个数是奇数,那么直接列方程可以求解,因为,如果第一个圆半径变大,必然导致最后一个圆的半径变大, 所以,节点是奇数的时候,要么无解,要么只有一组解. 如果节点个数是偶数,如果奇数编号起点的线段长度之和不等于偶数编号起点的线段长度之和,那么必定无解,这个列方程也可以发现的. 剩下的就要三分求最优解了,边界的确定有点小坑,第一个半径是X,第二个半径就是 L12-X,第三个半径就是L23-L12+X.....写出n个关于X的表达式,可以确定三…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4816 2013长春区域赛的D题. 很简单的几何题,就是给了一条折线. 然后一个矩形窗去截取一部分,求最大面积. 现场跪在这题,最后时刻TLE到死,用的每一小段去三分,时间复杂度是O(n log n) , 感觉数据也不至于超时. 卧槽!!!!代码拷回来,今天在HDU一交,一模一样的代码AC了,加输入外挂6s多,不加也8s多,都可AC,呵呵·····(估计HDU时限放宽了!!!) 现场赛卡三分太SXBK…

Stone Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 179    Accepted Submission(s): 137 Problem Description Tang and Jiang are good friends. To decide whose treat it is for dinner, they are pla…

题意:n个顶点组成的多边形能否形成正多边形? #include <cstdio> #include <cstring> #include <cmath> #include <cstdlib> #include <iostream> #include <algorithm> #include <queue> #include <map> #include <vector> using namespac…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4821 字符串题. 现场使用字符串HASH乱搞的. 枚举开头! #include <stdio.h> #include <string.h> #include <iostream> #include <algorithm> #include <queue> #include <map> #include <set> #inclu…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4814 进制转换. 现场根据题目给的两个公式,不断更新!!! 胡搞就可以了. 现场3A,我艹,一次循环开大TLE,一次开小WA,太逗了,呵呵 现场源码: #include <stdio.h> #include <string.h> #include <iostream> #include <algorithm> #include <queue> #in…

题目链接:acm.hdu.edu.cn/showproblem.php?pid=5538 House Building Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Total Submission(s): 621    Accepted Submission(s): 398 Problem Description Have you ever played the vid…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4815 简单的DP题. #include <stdio.h> #include <string.h> #include <iostream> #include <algorithm> #include <queue> #include <map> #include <set> #include <vector> #i…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=4813 签到题. 把一个字符串按照格式输出就可以了,很水 #include <stdio.h> #include <string.h> #include <iostream> #include <algorithm> #include <queue> #include <map> #include <set> #include…

链接:http://acm.hdu.edu.cn/showproblem.php?pid=4815 [题意] n个题目,每题有各自的分数,A有50%的概率答对一道题目得到相应分数,B想要在至少P的概率上总分不低于A,问B至少要得到多少分. [分析] 最简单粗暴的做法是算出每个可能得到的总分的概率,原问题可以转化成在概率和<=P下A所有可能得到的总分集合中最大分数的最小值为多少,于是答案就是按分数排序后前k项的概率和刚好>=P. 但是计算所有可能的概率的复杂度是O(2n),不能满足我们的需求.细…

题目链接: Hdu 5439 Aggregated Counting 题目描述: 刚开始给一个1,序列a是由a[i]个i组成,最后1就变成了1,2,2,3,3,4,4,4,5,5,5.......,最后问a[i]出现n次(i最大)时候,i最后一次出现的下标是多少? 解题思路: 问题可以转化为求a[i] == n (i最大),数列前i项的和为多少. index: 1 2 3 4 5 6 7 8 9 10 a:        1 2 2 3 3 4 4 4 5 5 可以观察出:ans[1] = 1,…

题目链接: Hdu  5445 Food Problem 题目描述: 有n种甜点,每种都有三个属性(能量,空间,数目),有m辆卡车,每种都有是三个属性(空间,花费,数目).问至少运输p能量的甜点,花费最小是多少? 解题思路: 明显可以看出是多重背包搞两次,但是数据范围太大了,背包要到2*1e6,感觉会TLe.还是呆呆的写了一发,果断超啊!然后滚回去看背包九讲课件了,看到了二进制压缩的时候,感觉可以搞这个题目.试了一下果然AC,原本物品数目是100*100,二进制压缩以后也就是100*log210…

Collision Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 685    Accepted Submission(s): 248Special Judge Problem Description There's a round medal fixed on an ideal smooth table, Fancy is tryin…

Travel Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2404    Accepted Submission(s): 842 Problem Description Jack likes to travel around the world, but he doesn’t like to wait. Now, he is tr…

求区间最值,数据范围也很小,因为只会线段树,所以套了线段树模板=.= Sample Input3110011 151 2 3 4 551 21 32 43 43 531 999999 141 11 22 33 3 Sample Output1002344519999999999991 # include <iostream> # include <cstdio> # include <cstring> # include <algorithm> # incl…

题意:M=p1*p2*...pk:求C(n,m)%M,pi小于10^5,n,m,M都是小于10^18. pi为质数 M不一定是质数 所以只能用Lucas定理求k次 C(n,m)%Pi最后会得到一个同余方程组x≡B[0](mod p[0])x≡B[1](mod p[1])x≡B[2](mod p[2])......解这个同余方程组 用中国剩余定理 Sample Input19 5 23 5 Sample Output6 # include <iostream> # include <cst…

题意  给定n个点,任意两点之间可以不连边也可以连边.如果连边的话可以染上m种颜色. 求最后形成的图,是一个带环连通图的方案数. 首先答案是n个点的图减去n个点能形成的树. n个点能形成的树的方案数比较好求,根据prufer序列可以知道n个点形成的无根树的个数为$n^{n-2}$ 那么现在问题变成求n个点形成的连通图的个数. 图有连通和不连通的,那么就是图的总数减去不连通的图的总数. 图的总数很简单,$m^{\frac{n(n-1)}{2}}$,那么现在要求不连通的图的总数. 设$f(n)$为$…

Problem Description In Land waterless, water is a very limited resource. People always fight for the biggest source of water. Given a sequence of water sources with a1,a2,a3,...,an representing the size of the water source. Given a set of queries eac…

Problem Description On the way to the next secret treasure hiding place, the mathematician discovered a cave unknown to the map. The mathematician entered the cave because it is there. Somewhere deep in the cave, she found a treasure chest with a com…

题意: 一个字符串S  问其中有几个子串能满足以下条件: 1.长度为M*L 2.可以被分成M个L长的小串  每个串都不一样 分析: hash方法,一个种子base,打表出nbase[i]表示base的i次方 将以i位字符开头之后的串hash成一个无符号长整型:hash[i]=hash[i+1]*base+str[i]-'a'+1 然后每个L长度的小串的hash值即为:hash[i]-hash[i+L]*nbase[L] map记录hash值的个数 以i位字符开头的字符串与以i+L位字符开头的字符…

Rebuild Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 446    Accepted Submission(s): 113 Problem Description Archaeologists find ruins of Ancient ACM Civilization, and they want to rebuild i…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5438 Ponds Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 2237    Accepted Submission(s): 707 Problem Description Betty owns a lot of ponds, som…

#include<stdio.h> #include<string.h> #include<iostream> #include<math.h> #include<stdlib.h> #include<algorithm> using namespace std; #define N 500000 #define mod 1000000007 __int64 a[N], b[N], ans[N]; void Init() { int…

Ponds Time Limit: 1500/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 1288    Accepted Submission(s): 429 Problem Description Betty owns a lot of ponds, some of them are connected with other ponds by pipes, a…