Save the Students Time Limit:134MS Memory Limit:0KB 64bit IO Format:%lld & %llu Description Hogwarts is under attack by the Dark Lord, He-Who-Must-Not-Be-Named. To protect the students, Harry Potter must cast protective spells so that those…
Hogwarts is under attack by the Dark Lord, He-Who-Must-Not-Be-Named. To protect the students, Harry Potter must cast protective spells so that those who are protected by the spells cannot be attacked by the Dark Lord. Harry has asked all the students…
题目 Source http://www.spoj.com/problems/DQUERY/en/ Description Given a sequence of n numbers a1, a2, ..., an and a number of d-queries. A d-query is a pair (i, j) (1 ≤ i ≤ j ≤ n). For each d-query (i, j), you have to return the number of distinct elem…
SPOJ - GSS3 Can you answer these queries III Description You are given a sequence A of N (N <= 50000) integers between -10000 and 10000. On this sequence you have to apply M (M <= 50000) operations: modify the i-th element in the sequence or for giv…
http://www.spoj.com/problems/SUBLEX/ 好难啊. 建出后缀自动机,然后在后缀自动机的每个状态上记录通过这个状态能走到的不同子串的数量.该状态能走到的所有状态的f值的和+1就是当前状态的f值. 最后对于询问的k,从root开始走顺便加加减减就可以了. #include<cstdio> #include<cstring> #include<algorithm> using namespace std; int in() { int k =…