就是我这个菜鸡,赛时写出了 E2 的做法,但是算错复杂度,导致以为自己的做法只能AC E1,就没交到 E2 上,然后赛后秒A..... 题意 定义一种字串为形如:\([\underbrace{a, a, \dots, a}_{x}, \underbrace{b, b, \dots, b}_{y}, \underbrace{a, a, \dots, a}_{x}]\) 问你在给定的字串中,符合这种要求的最大子序列(可以不连续)的长度 给出数列长度 \(n\le 2\cdot 10^5\),数列中每…

给定一个数组,找出最长的子序列,满足 a,a,..a,b,b,..b,a,a,..a 前面的a和后面的a都要是x个,中间的b是y个. 其中,x>=0且y>=0. \(\color{Red}{---------------------华丽分割线w(ﾟДﾟ)w------------------------}\) 看到这数据,就觉得暴力无疑. \(三种情况\) \(Ⅰ.当x=0,也就是只有中间部分,答案就是出现次数最多的那个数字.\) \(Ⅱ.当y=0,也就是只有两边的部分,那就要枚举前半部分区间…

D题想复杂了,花了好多时间,感觉也没时间看F了,就来写个题解蹭蹭访问量把^_^ 传送门:1335 A. Candies and Two Sisters 题意:你要把n个糖果分给两个人,两个人的糖果数不能相等,问你有几种分法. 题解:就是(n-1)/2 1 #include<bits/stdc++.h> 2 #define ll long long 3 using namespace std; 4 5 int main() 6 { 7 ios::sync_with_stdio(false); 8…

Palindrome Sub-Array Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 173    Accepted Submission(s): 80 Problem Description A palindrome sequence is a sequence which is as same as its reversed or…

Palindrome Sub-Array 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=4618 Description A palindrome sequence is a sequence which is as same as its reversed order. For example, 1 2 3 2 1 is a palindrome sequence, but 1 2 3 2 2 is not. Given a 2-D array…

题目链接 Problem Statement As you are probably aware, the Internet protocols specify a canonical byte order convention for data transmitted over the network called network byte order, so that machines with different byte order conventions can communicate…

刚过去的周五(3-14)例行地主持了技术会议,主题正好是<UI层的设计模式——从Script.Code Behind到MVC.MVP.MVVM>,是前一天晚上才定的,中午花了半小时准备了下就开讲了. 今天看到了大家在为MVVM knockout.js友(ji)好(lie)地交流,所以就整理下然后更扩展地分享. 主要目的也不是为了争论,毕竟只是正巧主题相近,原本的打算也就是一次技术分享并且记录下来. 那么我们就按照大致的历史进程将这些概念进行划分: Script Code Blocks.Code…

A positive integer is called a palindrome if its representation in the decimal system is the same when read from left to right and from right to left. For a given positive integer K of not more than 1000000 digits, write the value of the smallest pal…

Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. This is case sensitive, for example "Aa" is not considered a palindrome here. Note: Assume the leng…

Given a list of unique words. Find all pairs of distinct indices (i, j) in the given list, so that the concatenation of the two words, i.e. words[i] + words[j] is a palindrome. Example 1:Given words = ["bat", "tab", "cat"]Ret…