Hamming Problem Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1305 Accepted Submission(s): 583 Problem Description For each three prime numbers p1, p2 and p3, let's define Hamming sequence Hi(p1…

题意: For each three prime numbers p1, p2 and p3, let's define Hamming sequence Hi(p1, p2, p3), i=1, ... as containing in increasing order all the natural numbers whose only prime divisors are p1, p2 or p3. For example, H(2, 3, 5) = 2, 3, 4, 5, 6, 8, 9…

Hamming Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 595    Accepted Submission(s): 247 Problem Description For each three prime numbers p1, p2 and p3, let's define Hamming sequence…

HDU 3549 Flow Problem(最大流) Time Limit: 5000/5000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) [Description] [题目描述] Network flow is a well-known difficult problem for ACMers. Given a graph, your task is to find out the maximum flow for t…

题目链接:hdu 5106 Bits Problem 题目大意:给定n和r,要求算出[0,r)之间全部n-onebit数的和. 解题思路:数位dp,一个ct表示个数,dp表示和,然后就剩下普通的数位dp了.只是貌似正解是o(n)的算法.可是n才 1000.用o(n^2)的复杂度也是够的. #include <cstdio> #include <cstring> #include <algorithm> using namespace std; typedef long…

HDU 3374 String Problem (KMP+最大最小表示) String Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1602    Accepted Submission(s): 714 Problem Description Give you a string with length N, you c…

pid=5105" target="_blank" style="">题目链接:hdu 5105 Math Problem 题目大意:给定a.b,c,d.l,r.表示有一个函数f(x)=|a∗x3+b∗x2+c∗x+d|(L≤x≤R),求函数最大值. 解题思路:考虑极点就可以,将函数求导后得到f′(x)=0的x,即为极值点.在极值点处函数的单调性会发生变化,所以最大值一定就在区间边界和极值点上.注意a=0.b=0的情况,以及极值点不在区间上. #in…

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…

网络流 HDU 3549 Flow Problem 题目:pid=3549">http://acm.hdu.edu.cn/showproblem.php?pid=3549 用增广路算法进行求解.注意的问题有两个: 1. 每次增广的时候,反向流量也要进行更行.一開始没注意,WA了几次 ORZ 2. 对于输入的数据,容量要进行累加更新. // 邻接矩阵存储 #include <bits/stdc++.h> using namespace std; const int INF = 0…

http://acm.hdu.edu.cn/showproblem.php?pid=4712 Hamming Distance Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 797    Accepted Submission(s): 284 Problem Description (From wikipedia) For binary…

A - Train Problem I Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 1022 Description As the new term comes, the Ignatius Train Station is very busy nowadays. A lot of student want to get back to…

String Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 2706    Accepted Submission(s): 1140 Problem Description Give you a string with length N, you can generate N strings by left shift…

Hamming Distance Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others) Problem Description (From wikipedia) For binary strings a and b the Hamming distance is equal to the number of ones in a XOR b. For calculating Hammi…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=3549 Flow Problem Description Network flow is a well-known difficult problem for ACMers. Given a graph, your task is to find out the maximum flow for the weighted directed graph. Input The first line of…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5427 A problem of sorting Description There are many people's name and birth in a list.Your task is to print the name from young to old.(There is no pair of two has the same age.) Input First line contai…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5104 Primes Problem Description Given a number n, please count how many tuple$(p_1, p_2, p_3)$ satisfied that $p_1 \leq p_2  \leq p_3, $ $p_1,p_2,p_3$ are primes and $p_1 + p_2 + p_3 = n$. Input Multiple…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=1212 Train Problem II Description As we all know the Train Problem I, the boss of the Ignatius Train Station want to know if all the trains come in strict-increasing order, how many orders that all the t…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3549 Network flow is a well-known difficult problem for ACMers. Given a graph, your task is to find out the maximum flow for the weighted directed graph. Input The first line of input contains an integer…

Hard problem 题目链接: http://acm.split.hdu.edu.cn/showproblem.php?pid=5858 Description cjj is fun with math problem. One day he found a Olympic Mathematics problem for primary school students. It is too difficult for cjj. Can you solve it? Give you the…

Water problem 题目链接: http://acm.split.hdu.edu.cn/showproblem.php?pid=5867 Description If the numbers 1 to 5 are written out in words: one, two, three, four, five, then there are 3+3+5+4+4=19 letters used in total.If all the numbers from 1 to n (up to…

A problem of sorting Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://bestcoder.hdu.edu.cn/contests/contest_chineseproblem.php?cid=627&pid=1001 Description 给出一张许多人的年龄和生日表.你需要从年轻到年老输出人们的名字.(没有人年龄相同) Input 第一行包含一个正整数T(T \leq 5)T(T≤5),表示数据组数. 对于每组数据,第…

Food Problem Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5445 Description Few days before a game of orienteering, Bell came to a mathematician to solve a big problem. Bell is preparing the dessert for the gam…

Ugly Problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 0    Accepted Submission(s): 0Special Judge Problem Description Everyone hates ugly problems.You are given a positive integer. You mu…

Hamming Distance Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 499    Accepted Submission(s): 163 Problem Description (From wikipedia) For binary strings a and b the Hamming distance is equal…

Hamming Distance Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65535/65535 K (Java/Others) Total Submission(s): 1127 Accepted Submission(s): 425 Problem Description (From wikipedia) For binary strings a and b the Hamming distance is equal to t…

String problem 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5772 Description This is a simple problem about string. Now a string S contains only '0'-'9'. ?? wants to select a subsequence from this string. And makes this subsequence score maximum.…

Hamming Distance Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65535/65535 K (Java/Others)Total Submission(s): 1569    Accepted Submission(s): 616 Problem Description (From wikipedia) For binary strings a and b the Hamming distance is equal…

Annoying problem 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5293 Description Coco has a tree, whose vertices are conveniently labeled by 1,2,-,n. There are m chain on the tree, Each chain has a certain weight. Coco would like to pick out some ch…

Annoying problem 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5296 Description Coco has a tree, whose nodes are conveniently labeled by 1,2,-,n, which has n-1 edge,each edge has a weight. An existing set S is initially empty. Now there are two kin…

传送门:http://acm.hdu.edu.cn/showproblem.php?pid=1022 Train Problem I Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 45375    Accepted Submission(s): 16966 Problem Description As the new term come…