HDU 5487 Difference of Languages 这题从昨天下午2点开始做,到现在才AC了.感觉就是好多题都能想出来,就是写完后debug很长时间,才能AC,是不熟练的原因吗?但愿孰能生巧吧. BFS转移的是两个DFA的状态,用typedef pair<int,int> pi;map<pi,pi> pres;      两步储存前后状态的链接. 附上一组测坑数据: /*4324 3 130 1 a1 2 e2 3 w6 3 150 1 a1 3 e3 5 h*/ #…

Difference of Languages Time Limit: 1000ms Memory Limit: 32768KB This problem will be judged on HDU. Original ID: 548764-bit integer IO format: %I64d      Java class name: Main A regular language can be represented as a deterministic finite automaton…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=4715 Difference Between Primes Description All you know Goldbach conjecture.That is to say, Every even integer greater than 2 can be expressed as the sum of two primes. Today, skywind present a new conje…

Difference Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 62    Accepted Submission(s): 19 Problem Description Little Ruins is playing a number game, first he chooses two positive integers y an…

Difference of Clustering HDU - 5486 题意:有n个实体,新旧两种聚类算法,每种算法有很多聚类,在同一算法里,一个实体只属于一个聚类,然后有以下三种模式. 第一种分散,新算法的某几个聚类是旧算法某个聚类的真子集. 第二种聚合,旧算法的某几个聚类是新算法某个聚类的真子集. 第三种1:1,新算法的某个聚类跟旧算法某个聚类相同. 问每种模式存在多少个? 实路上很明了,就是模拟,而且每个实体最多遍历到一次,所以时间上不用担心. 先把聚类的编号hash,把每个实体分配到相应…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5486 题意: 给你每个元素一开始所属的集合和最后所属的集合,问有多少次集合的分离操作,并操作和不变操作. 分离:[m1,m2,m3]->[m1],[m2],[m3] 合并:分离的逆操作 不变:[m1,m2,m3]->[m1,m2,m3] 题解: 以集合为单位建图,(一个元素从集合s1到s2则建一条边连接集合s1,s2,注意要删除重边) 然后对于每个点,与它相邻的点如果入度都为1,则为分离操作,…

http://acm.hdu.edu.cn/showproblem.php?pid=4715 [code]: #include <iostream> #include <cstdio> #include <cstring> #include <cmath> using namespace std; #define N 1000151 ]; ]; ]; ]; ; int lowbit(int i) { return i&-i; } void add(i…

Difference Between Primes Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 860 Accepted Submission(s): 278 Problem Description All you know Goldbach conjecture.That is to say, Every even integer gr…

Difference Between Primes Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 528    Accepted Submission(s): 150 Problem Description All you know Goldbach conjecture.That is to say, Every even inte…

http://acm.hdu.edu.cn/showproblem.php?pid=5936 题意: 定义了这样一种算法,现在给出x和k的值,问有多少个y是符合条件的. 思路: y最多只有10位,再多x就是负的了. 这样的话可以将y分为前后两部分,我们先枚举后5位的情况,然后再枚举前5位的情况,通过二分查找找到匹配的项,这样就大大的降低了时间复杂度. #include<iostream> #include<algorithm> #include<cstring> #in…