题意:定义一个串是k-happy的:对于所有的Ai,都有Aj(j!=i),使得|Ai-Aj|<=k. 问使得原串至少存在一个长度>=m的连续子串是k-happy的最小的k? 标程: #include<bits/stdc++.h> using namespace std; const int Max=1e7; ; int rg[N],lf[N],a[N],n,m,l,r,ans,res,bit[N],L,R,b[N]; int lowbit(int x){return x&(…
大数据量,比如10万以上的数据,数据库在5G以上,单表5G以上等.大数据分页时需要考虑的问题更多. 比如信息表,单表数据100W以上. 分页如果在1秒以上,在页面上的体验将是很糟糕的. 优化思路: 1.主键索引,如ID自增列,主键 2.借助sqlserver的ROW_NUMBER()实现分页,分页时只需得到ID即可,如: WITH NoPagedTable AS ( SELECT ROW_NUMBER() OVER (order by ctime desc) AS rowIndex, ID FR…
题目地址:https://www.luogu.org/problemnew/show/P1032 洛谷训练场BFS的训练题呀. “BFS不就是用队列的思想去遍历一切情况嘛.我已经不是小孩子了,我肯定能做出来!” A FEW MINUTES LATER “QAQ我错了,这题怎么用BFS的思想呀.” 毫无头绪的我选择向题解求助. /学习从来就不是一件容易的事情,但这可以做成一件让自己快乐的事情/ 耐下心来,仔细阅读以及翻资料,终于看明白了ShawnZhou大牛的代码(以下粘贴的代码均是ShawnZh…
使用JQuery对多个ajax请求串行执行. HTML代码: <a href="#">Click me!</a> <div></div> JS: function GetSomeDeferredStuff() { var deferreds = []; var i = 1; for (i = 1; i <= 10; i++) { var count = i; deferreds.push( $.post('/echo/html/',…
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 string S, you are allowed to convert it to a palindrome by adding characters in front of it. Find and return the shortest palindrome you can find by performing this transformation. For example: Given "aacecaaa", return "aaacecaaa&qu…
Write an algorithm to determine if a number is "happy". A happy number is a number defined by the following process: Starting with any positive integer, replace the number by the sum of the squares of its digits, and repeat the process until the…
Given a string s, partition s such that every substring of the partition is a palindrome. Return the minimum cuts needed for a palindrome partitioning of s. For example, given s = "aab", Return 1 since the palindrome partitioning ["aa"…
Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. For example, given s = "aab",Return [ ["aa","b"], ["a","a","…
Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest palindromic substring. 这道题让我们求最长回文子串,首先说下什么是回文串,就是正读反读都一样的字符串,比如 "bob", "level", &q…
