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D. Constant Palindrome Sum 差分+思维
https://codeforces.ml/problemset/problem/1343/D 差分: 对于每一对max+min=sum,当sum等于以下区间的值时需要改变的次数; [2,min]+=2; [max+k+1,2*k]+=2; [min+1,max+k]+=1; [max+min,ma ...
分类:其他好文   时间:2020-12-19 13:03:05    阅读次数:2
LeetCode初级算法之字符串:242 有效的字母异位词
有效的字母异位词 题目地址:https://leetcode-cn.com/problems/valid-anagram/ 给定两个字符串 s 和 t ,编写一个函数来判断 t 是否是 s 的字母异位词。 示例 1: 输入: s = "anagram", t = "nagaram" 输出: true ...
分类:编程语言   时间:2020-12-15 12:32:59    阅读次数:4
Leetcode 234. Palindrome Linked List
Description: Given a singly linked list, determine if it is a palindrome. Link: https://leetcode.com/problems/palindrome-linked-list/ Examples: Exampl ...
分类:其他好文   时间:2020-12-05 11:02:42    阅读次数:7
vue element-ui rules 封装
新建validator.js,内容如下,参考补充: const valid = { REG_PHONE: /^[1]([3-9])[0-9]{9}$/, checkNull(rule, value, callback, message, flag = true) { if (isNullOrEmpt ...
分类:其他好文   时间:2020-11-25 12:29:42    阅读次数:4
matplotlib绘图
%matplotlib inline import matplotlib.pyplot as plt plt.plot(xx,yy_train_loss,"r", label = "train_loss") plt.plot(xx,yy_valid_loss,"b", label = "valid_ ...
分类:其他好文   时间:2020-11-17 13:00:36    阅读次数:26
error: ISO C++ forbids initialization of member ‘valid’
> install.packages("farver")Installing package into ‘/usr/lib64/R/library’(as ‘lib’ is unspecified)trying URL 'https://mirrors.bfsu.edu.cn/CRAN/src/co ...
分类:编程语言   时间:2020-11-12 14:22:52    阅读次数:14
Vue-router路由导航
登陆按钮的方法 loginbtn () { // 预校验 this.$refs.loginRef.validate(async (valid) => { // console.log(valid) if (!valid) { return } // 数据解构 const { data: res } ...
分类:其他好文   时间:2020-11-12 13:23:07    阅读次数:6
cannot undefine domain with nvram
[root@localhost ~]# virsh undefine vhuser-test1error: Failed to undefine domain vhuser-test1error: Requested operation is not valid: cannot undefine d ...
分类:其他好文   时间:2020-11-04 19:04:17    阅读次数:16
LeetCode 941 有效的山脉数组
LeetCode 941 有效的山脉数组 https://leetcode-cn.com/problems/valid-mountain-array/ 根据题意可以知道,当一个数组中的最大值在数组的中间某个位置(不能在数组的左右两端)并且这个位置往左边和右边走时数组是严格递减时,该数组才是有效的山脉 ...
分类:编程语言   时间:2020-11-04 17:42:49    阅读次数:19
Authentication token is no longer valid; new one required You (oracle) are not allowed to access to (crontab) because of pam configuration.
-bash-4.1$ crontab -e Authentication token is no longer valid; new one requiredYou (oracle) are not allowed to access to (crontab) because of pam conf ...
分类:数据库   时间:2020-10-31 01:45:57    阅读次数:28
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