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…

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…

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…

http://poj.org/problem?id=3691 http://acm.hdu.edu.cn/showproblem.php?pid=2457 DNA repair Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 5690   Accepted: 2669 Description Biologists finally invent techniques of repairing DNA that contain…

题目链接 做题, #include <cstdio> #include <string> #include <cstring> using namespace std; #define MOD 20090717 ][]; ]; ]; ]; ][][]; ]; int t; void CL() { memset(trie,-,sizeof(trie)); memset(dp,,sizeof(dp)); memset(o,,sizeof(o)); t = ; } void…

意甲冠军: 给n快报,和m频率. 然后进入n字母出现的概率 然后给目标字符串str 然后问m概率倍的目标字符串是敲数量. 思维: AC自己主动机+可能性dp简单的问题. 首先建立trie图,然后就是状态转移了 dp版本号: dp三重循环变量次数,节点数,和字母数 代码: #include"cstdlib" #include"cstdio" #include"cstring" #include"cmath" #include&q…

题目链接:BCD Code 解析:n个病毒串.问给定区间上有多少个转换成BCD码后不包括病毒串的数. 很奇妙的题目. . 经典的 AC自己主动机 + 数位DP 的题目. 首先使用AC自己主动机,得到bcd[i][j]表示状态i,加了数字j以后到达的状态.为-1表示不能转移 然后就是数位DP了 注意记录为0的状态 AC代码: #include <cstdio> #include <iostream> #include <cstring> #include <algo…

pid=2896">http://acm.hdu.edu.cn/showproblem.php?pid=2896 病毒侵袭 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 11796    Accepted Submission(s): 3067 Problem Description 当太阳的光辉逐渐被月亮遮蔽.世界失去了光明,…

点击打开链接题目链接 Keywords Search Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 42838    Accepted Submission(s): 13488 Problem Description In the modern time, Search engine came into the life of eve…

本题是在text里面查找key word的增强版.由于这里有多个text. 那么就不能够简单把Trie的叶子标志记录改动成-1进行加速了,能够使用其它技术.我直接使用个vis数组记录已经訪问过的节点,达到加速效果,速度还算挺快的. 只是看discuss里面有人直接使用Trie,做出了140ms的速度,并且他的程序严格来说并不对.可见本题的数据非常水啊.Trie的时间效率肯定比AC自己主动机低,可是在数据非常水的特殊情况下.Trie的速度也能够非常快的. 注意两个细节: 1 病毒也须要安装顺序输出…