HDU2825 Wireless Password Problem Description Liyuan lives in a old apartment. One day, he suddenly found that there was a wireless network in the building. Liyuan did not know the password of the network, but he got some important information from h…

题目链接:https://vjudge.net/problem/HDU-2825 Wireless Password Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7733    Accepted Submission(s): 2509 Problem Description Liyuan lives in a old apartmen…

Description Liyuan lives in a old apartment. One day, he suddenly found that there was a wireless network in the building. Liyuan did not know the password of the network, but he got some important information from his neighbor. He knew the password…

Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 5400    Accepted Submission(s): 1704 Problem Description Liyuan lives in a old apartment. One day, he suddenly found that there was a wireless ne…

f(i,j,S)表示当前字符串总长度为i,dp到AC自动机第j个结点,单词集合为S时的方案数. 要注意有点卡常数,注意代码里的注释. #include<cstdio> #include<cstring> #include<queue> using namespace std; queue<int>q; #define MOD 20090717; int child[111][26],fail[111],size,f[30][111][1100],tag[11…

题目大意:给一系列字符串,用小写字母构造出长度为n的至少包含k个字符串的字符串,求能构造出的个数. 题目分析:在AC自动机上走n步,至少经过k个单词节点,求有多少种走法. 代码如下: # include<iostream> # include<cstdio> # include<queue> # include<cstring> # include<algorithm> using namespace std; typedef long long…

题目问长度n至少包含k个咒语的字符串有多少个.也是比较入门的题.. dp[i][j][S]表示长度i(在自动机上转移k步)且后缀状态为自动机上第j个结点且当前包含咒语集合为S的方案数 dp[0][0][0]=1 还是用我为人人转移,AC自动机上的结点要多一个域表示这个结点所代表咒语前缀包含的咒语集合. #include<cstdio> #include<cstring> #include<queue> using namespace std; ][],fail[],fl…

Wireless Password Time Limit: 1000MS   Memory Limit: 32768KB   64bit IO Format: %I64d & %I64u Description Liyuan lives in a old apartment. One day, he suddenly found that there was a wireless network in the building. Liyuan did not know the password…

Wireless Password Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4022    Accepted Submission(s): 1196 Problem Description Liyuan lives in a old apartment. One day, he suddenly found that there…

pid=2825">http://acm.hdu.edu.cn/showproblem.php? pid=2825 Wireless Password Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 4560    Accepted Submission(s): 1381 Problem Description Liyuan li…