Life Forms Time Limit: 5000MS   Memory Limit: 65536K Total Submissions: 10800   Accepted: 2967 Description You may have wondered why most extraterrestrial life forms resemble h…

Life Forms   Description You may have wondered why most extraterrestrial life forms resemble humans, differing by superficial traits such as height, colour, wrinkles, ears, eyebrows and the like. A few bear no human resemblance; these typically have…

题目传送门 传送门I 传送门II 题目大意 给定$n$个串,询问所有出现在严格大于$\frac{n}{2}$个串的最长串.不存在输出'?' 用奇怪的字符把它们连接起来.然后求sa,hei,二分答案,按mid分组. 判断每一组存在的后缀属于的原串的种类数是不是存在那么多个. 这个做法可以推广到多串求LCS,然后多个log,完美在SPOJ上T掉. Code /** * poj * Problem#3294 * Accepted * Time: 391ms * Memory: 5024k */ #in…

1.注意每两个串之间的连接符要不一样. 2.分组的时候要注意最后一组啊!又漏了! 3.开数组要考虑连接符的数量.100010是不够的至少要101000. #include<cstdio> #include<cstdlib> #include<cstring> #include<iostream> using namespace std; ; int n,cl,sl,ans,tt,c[N],tl[N],tr[N],al[N],ar[N],rk[N],Rs[N]…

[题目链接] http://poj.org/problem?id=3080 [题目大意] 求k个串的最长公共子串,如果存在多个则输出字典序最小,如果长度小于3则判断查找失败. [题解] 将所有字符串通过拼接符拼成一个串,做一遍后缀数组,二分答案,对于二分所得值,将h数组大于这个值的相邻元素分为一组,判断组内元素是否覆盖全字典,是则答案成立,对于答案扫描sa,输出第一个扫描到的子串即可. [代码] #include <cstdio> #include <cstring> #inclu…

BZOJ_2946_[Poi2000]公共串_后缀数组+二分答案 Description          给出几个由小写字母构成的单词,求它们最长的公共子串的长度. 任务: l        读入单词 l        计算最长公共子串的长度 l        输出结果   Input 文件的第一行是整数 n,1<=n<=5,表示单词的数量.接下来n行每行一个单词,只由小写字母组成,单词的长度至少为1,最大为2000. Output 仅一行,一个整数,最长公共子串的长度. Sample In…

Musical Theme Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 28435 Accepted: 9604 Description A musical melody is represented as a sequence of N (1<=N<=20000)notes that are integers in the range 1..88, each representing a key on the pian…

Milk Patterns Case Time Limit: 2000MS Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he discovered that although he can't predict the quality of milk from one day to th…

题目链接:https://vjudge.net/problem/POJ-2774 Long Long Message Time Limit: 4000MS   Memory Limit: 131072K Total Submissions: 33144   Accepted: 13344 Case Time Limit: 1000MS Description The little cat is majoring in physics in the capital of Byterland. A…

http://cogs.pro:8080/cogs/problem/problem.php?pid=pxXNxQVqP 题意:给m个单词,让求最长公共子串的长度. 思路:先把所有单词合并成一个串(假设长度是n,包含分隔符),中间用不同符号分隔,求出high[i](表示rk为i的和rk为i+1的后缀的最长公共前缀),然后二分答案ans,对于rk从1扫到n,如果有一段连续的rk值使得high[rk]>=ans且这段的串盖满了每个单词块,那么ans成立,即最终答案大于ans. #include <a…