Hidden String Accepts: 437 Submissions: 2174 Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 262144/262144 K (Java/Others) 问题描写叙述 今天是BestCoder一周年纪念日. 比赛管理员Soda有一个长度为n的字符串s. 他想要知道是否能找到s的三个互不相交的子串s[l1..r1], s[l2..r2], s[l3..r3]满足下列条件: 1. 1≤l1≤r1<l…

B. Hidden String Time Limit: 1 Sec Memory Limit: 256 MB 题目连接 http://bestcoder.hdu.edu.cn/contests/contest_chineseproblem.php?cid=610&pid=1002 Description 今天是BestCoder一周年纪念日. 比赛管理员Soda有一个长度为n的字符串s. 他想要知道能否找到s的三个互不相交的子串s[l1..r1], s[l2..r2], s[l3..r3]满足…

Souvenir  Accepts: 1078  Submissions: 2366  Time Limit: 2000/1000 MS (Java/Others)  Memory Limit: 262144/262144 K (Java/Others) Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, wants to buy a souvenir for each…

http://acm.hdu.edu.cn/showproblem.php?pid=5311 Hidden String Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others)Total Submission(s): 1499    Accepted Submission(s): 534 Problem Description Today is the 1st anniversar…

题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5311 Hidden String Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a string s of length n. He wants to find three nonoverlapping substrings $s[l_1..r_1], s[l_2..r_2…

Hidden String Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Total Submission(s): 1679    Accepted Submission(s): 591 Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, get…

Hidden String Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 262144/262144 K (Java/Others) Total Submission(s): 52    Accepted Submission(s): 25 Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a…

题目传送门 /* 设一个b[]来保存每一个a[]的质因数的id,从后往前每一次更新质因数的id, 若没有,默认加0,nlogn复杂度: 我用暴力竟然水过去了:) */ #include <cstdio> #include <iostream> #include <cstring> #include <string> #include <algorithm> using namespace std; ; const int INF = 0x3f3f…

Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a string s of length n. He wants to find three nonoverlapping substrings s[l1..r1], s[l2..r2], s[l3..r3] that: . ≤l1≤r1<l2≤r2<l3≤r3≤n . The concatenation…

当要求递推数列的第n项且n很大时,怎么快速求得第n项呢?可以用矩阵快速幂来加速计算.我们可以用矩阵来表示数列递推公式比如fibonacci数列 可以表示为 [f(n)   f(n-1)] = [f(n-1)    f(n-2)] [ 1 1 ]     [ 1 0 ] 设A = [ 1 1 ]  [ 1 0 ] [f(n)   f(n-1)] = [f(n-2)   f(n-3)]*A*A[f(n)   f(n-1)] = [f(2)   f(1)]*A^(n-2)矩阵满足结合律,所以先计算A^…