sort Time Limit: 6000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25803    Accepted Submission(s): 7764 Problem Description 给你n个整数,请按从大到小的顺序输出其中前m大的数.   Input 每组测试数据有两行,第一行有两个数n,m(0<n,m<1000000),第二行包含n个各不相同…

[题目链接] http://acm.hdu.edu.cn/showproblem.php?pid=1496 [题目大意] 给出一个方程ax1^2+bx2^2+cx3^2+dx4^2=0,求-100到100范围内的解集数量 [题解] 将ax1^2+bx2^2存入哈希,反查-cx3^2-dx4^2. [代码] #include <cstdio> #include <algorithm> #include <cstring> using namespace std; cons…

题目: Given a string s and a non-empty string p, find all the start indices of p's anagrams in s. Strings consists of lowercase English letters only and the length of both strings s and p will not be larger than 20,100. The order of output does not mat…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=1425 sort Time Limit: 6000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 33461    Accepted Submission(s): 9968 Problem Description 给你n个整数,请按从大到小的顺序输出其中前m大的数.   In…

Negative and Positive (NP) Time Limit: 3000/1500 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 2177    Accepted Submission(s): 556 Problem Description When given an array (a0,a1,a2,⋯an−1) and an integer K, you are…

2014多校第一题,当时几百个人交没人过,我也暴力交了几发,果然不行. 比完了去学习了BSGS才懂! 题目:http://acm.hdu.edu.cn/showproblem.php?pid=4887 Endless Punishment Time Limit: 30000/15000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 52    Accepted Submissi…

一.写在前面 哈希表(Hash Table),又称散列表,是一种可以快速处理插入和查询操作的数据结构.哈希表体现着函数映射的思想,它将数据与其存储位置通过某种函数联系起来,其在查询时的高效性也体现在这里.换言之,我们建立一个函数关系(称之为散列函数):data->address,将数据和其存储位置关联:查询时,我们只需要根据我们建立的函数关系就能通过data查询到address. 可见,散列函数的建立直接影响着哈希表的效率.当我们的散列函数建立得足够优时,哈希表在插入和查询上的时间复杂度都能被降…

Ignatius and the Princess III Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 11810    Accepted Submission(s): 8362 Problem Description "Well, it seems the first problem is too easy. I will let…

本文转自:http://www.cnblogs.com/gsk99/archive/2011/08/28/2155988.html 以下是PetShop中DBHelper中的使用过程: //创建哈希表 Hashtable to store cached parametersprivate static Hashtable parmCache = Hashtable.Synchronized(new Hashtable()); ... //缓存数据string cacheKey = "xxxx&q…

Snowflake Snow Snowflakes Time Limit: 4000MS   Memory Limit: 65536K Total Submissions: 27312   Accepted: 7213 题目链接:http://poj.org/problem?id=3349 Description You may have heard that no two snowflakes are alike. Your task is to write a program to dete…