middle meet the in
The solution of P3012
problem & blog 很明显是个 DP。 于是我们定义 \(dp_{i,j,k}\) 为末尾的字符的 ASCII 码为 \(i\),有 \(j\) 个大写字母,\(k\) 个小写字母。 然后在枚举能接在 \(i\) 之后所有字母即可。 然后考虑 \(dp_{i,j,k}\) 给后面的 DP ......
The 2022 ICPC Asia Xi'an Regional Contest
C. Clone Ranran 最优解一定是先复制,在做题。最多只需要复制大约 30 次,直接枚举即可 #include <bits/stdc++.h> using namespace std; #define int long long int a , b, c; void solve(){ ci ......
Go - Logging to the System Log Service
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The solution of ABC144F
都不知道什么时候做的题了 problem & blog 一开始很容易想到枚举断边然后 DP 算代价。 于是很容易想到 DP 状态定义:设 \(dp_u\) 为从 \(u\) 出发到 \(n\) 的期望步数。 那么显然有 \(dp_u = \sum^{v_n}_{v_1} \dfrac{dp_{v_{ ......
vue_error_Runtime directive used on component with non-element root node. The directives will not function as intended
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Go - Change What Is Being Logged by the Standard Logger
Problem: You want to change what the standard logger logs. Solution: Use the SetFlags function to set flags and add fields to each log line. The defau ......
Gym 104270 The 2018 ICPC Asia Qingdao Regional Programming Contest (The 1st Universal Cup, Stage 9: Qingdao)
A. Sequence and Sequence B. Kawa Exam 可以发现,对答案会产生影响的只有割边,把所有边双缩起来,然后就是一个森林。 考虑一个树的时候怎么做,就是对于每条边求出这条边两端的众数个数,考虑线段树合并,每次动态维护子树内的众数和子树外的众数。 #include<iost ......
MongoDB playground All In One
MongoDB playground All In One
MongoDB REPL
Node.js
aggregate
......
Go - Using Multiple Versions of the Same Dependent Packages
Problem: You want to use multiple versions of the same dependent packages in your code. Solution: Use the replace directive in the go.mod file to rena ......
How to get Postman API request code All In One
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Postman can convert an API request into a code snippet, and you can choose the programming language or ... ......
Road of the King
2023-09-28 题目 Road of the King 难度&重要性(1~10):8.5 题目来源 luogu 题目算法 (纯)dp 解题思路 一道非常好而有意思的题目,码量巨短。 首先观察数据范围,发现是 \(n\le 300\),考虑 \(O(n^3)\) 的 dp。 主要的难点在于如何去 ......
Measuring memory usage in Windows 7
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a Higher Kinded Type package in TypeScript
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pip安装包报错:PS C:\Users\Administrator\Desktop> pip install request ERROR: Could not find a version that satisfies the requirement request (from versions: none)
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qoj6735. Tree (The 1st Universal Cup. Stage 22: Shaanxi)
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The 2021 China Collegiate Programming Contest (Harbin) JBEIDG
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CF1447 Codeforces Round 683 (Div. 2, by Meet IT)
CF1447A Add Candies 可以将操作看做将 \(a_i\) 减 \(i\),然后第 \(i\) 次操作 \(i\) 就是合法的。 #include<iostream> #include<cstdio> using namespace std; int T; int n; void so ......
Gym 104172 The 2023 ICPC Asia Hong Kong Regional Programming Contest (The 1st Universal Cup, Stage 2Hong Kong)
A. TreeScript 令 \(f_u\) 表示 \(u\) 及 \(u\) 子树中的节点都创建的最小数量。 如果 \(u\) 只有一个儿子,那么可以将子树最后一个节点存储在当前的 \(u\) 中,答案就是 \(f_v\)。 若 \(u\) 有多个儿子: 令 \(t=\max\limits_{v ......
How to add a string that contains whitespace to array in shell script All In One
How to add a string that contains whitespace to array in shell script All In One
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异常:no transaction is in progress
转载请注明出处: 在使用 @Scheduled 注解创建了一个定时任务,并通过定时任务不断向mysql写入数据,写入数据的方式是通过 jpa 的方式,在代码运行的过程中出现错误:no transaction is in progress。 以下是异常堆栈: 原因分析: 该异常表明没有事务正在进行,导 ......
编程语言mojo报错:error: cannot call function that may raise in a context that cannot raise
代码: from python import Python fn main(): # fn main() raises: # This is equivalent to Python's `import numpy as np` let np = Python.import_module("nump ......
【流行前沿】DRAG Divergence-based Adaptive Aggregation in Federated learning on Non-IID Data
今天再分享一篇9月的联邦学习领域处理异构数据分布的文章。看挂名是复旦的王昕,总的来说只能算是踏实的工作,但是新意上确实不太够。 文章的主要处理对象是解决异构数据在联邦训练中的client-drift问题,当然与很多相似论文一样,也将这个方法迁移到了拜占庭攻击的防范上。不过这个robustness仅通 ......
Congratulations to Google on its 25th birthday All In One
Congratulations to Google on its 25th birthday All In One
祝贺 Google 25 周岁生日 All In One
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数据库 - MySQL转换SQL Server时,替换 FIND_IN_SET 函数引发的问题
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