regionals multiply contest problem
AtCoder Beginner Contest 305 题解
https://atcoder.jp/contests/abc305/tasks_print # E - Art Gallery on Graph 冷知识:md 这题赛时没做出来 /cy 刚看到题:这是什么题啊,$K, h$ 都 $1e5$ 能做吗 /fn 确实能做。 考虑类似 SPFA 的操作。 ......
【每日一题】Problem 363B. Fence
[原题](https://codeforces.com/problemset/problem/363/B) #### 解决思路 求 k 个木板的最小高度和,因为所有木板的高度和不超过 1e9,因此计算出到当前木板 j 的总高度 - 前 j - k 模板的总高度并求得最小数即可 ```C++ #inc ......
AtCoder Beginner Contest 258 F Main Street
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc258_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc258/tasks/abc258_f "AtCoder 传送门") 发现这题有个远古的 ......
【每日一题】Problem 331C1. The Great Julya Calendar
[原题](https://codeforces.com/problemset/problem/331/C1) #### 解决思路 寻求减到 0 所需的最小次数,即 $Num(n) \Rightarrow Num(n-x)+1$ 当存在一个 x 使得 (n - x)% 10 = 0 时,那么(n - ......
AtCoder Beginner Contest 305
## [A - Water Station (abc305 a)](https://atcoder.jp/contests/abc305/tasks/abc305_a) ### 题目大意 给定一个数字$x$,输出一个数字,它是最接近$x$的 $5$的倍数。 ### 解题思路 令$y = x \% 5 ......
【每日一题】Problem 327A - Flipping Game
[原题](https://codeforces.com/problemset/problem/327/A) #### 解决思路 计算数字 "1" 的最大数目,可以转换成计算数组最大和,即求 $maxSum(oldArraySum - (1 \rightarrow 0) + (0 \rightarro ......
AtCoder Beginner Contest 290 Ex Bow Meow Optimization
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc290_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc290/tasks/abc290_h "AtCoder 传送门") 考虑观察答案形态。 ......
yum源使用报错-RockyLInux8.7-Modular dependency problem:
报错信息如下: Kubernetes 11 kB/s | 173 kB 00:15 Modular dependency problem: Problem: conflicting requests - nothing provides module(perl-DBI:1.641) needed b ......
Windows证书管理器 && SSL certification && WSL-Docker: curl: (60) SSL certificate problem: unable to get local issuer certificate
深入浅出certmgr——Windows证书管理器 https://www.fke6.com/html/91605.html 计算机安全是当前社会的一个重要议题,证书是一种重要的安全机制,负责证明数据、软件或者人的身份和信誉。certmgr(即“证书管理器”)是Windows中专门用于证书管理的工具 ......
【每日一题】Problem 313B - Ilya and Queries
[原题](https://codeforces.com/problemset/problem/313/B) #### 解决思路 使用后缀和计算到 i 处共有多少对 $s_i = s_{i+1}$,计算时相减以下就可以 ```C++ #include int main() { std::string ......
AtCoder Beginner Contest 240 D
[**D - Strange Balls**](https://atcoder.jp/contests/abc240/tasks/abc240_d) tag:栈模拟 发现自己隔了快半年再做此题看错相同数字的球消失的条件,不是 $k \geq 2$ 而是 $k = a_i$ ~~电子竞技不需要视力~~ ......
AtCoder Beginner Contest 304 G Max of Medians
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc304_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc304/tasks/abc304_g "AtCoder 传送门") 首先显然二分答案, ......
【每日一题】Problem 1832B - Maximum Sum
[原题](https://codeforces.com/problemset/problem/1832/B) #### 解决思路: 类似滑动窗口的方式,窗口大小为 k 次操作,从中找到更大的结果即可 #### 误区: 一开始的想法是每次都在前一次的基础上减去最少的,然而在样例的第五个测试点出错,因为 ......
codeforces.com/contest/1553/problem/B
# [简单字符串哈希](https://codeforces.com/contest/1553/problem/B) ## 题意 给一个字符串s和t,问从s的某个位置开始,向右到某个点后再向左,顺序遍历到的字符形成的字符串可否为t。 ## 思路 数据只有500,$O(n^3)$可过,枚举转折点,然后 ......
AtCoder Beginner Contest 150 E Change a Little Bit
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc150_e "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc150/tasks/abc150_e "AtCoder 传送门") 令 $S_i \g ......
AtCoder Beginner Contest 149 F Surrounded Nodes
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc149_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc149/tasks/abc149_f "AtCoder 传送门") 不错的题。 考虑题 ......
Contrastive Learning for Representation Degeneration Problem in Sequential Recommendation
[TOC] > [Qiu R., Huang Z., Ying H. and Wang Z. Contrastive learning for representation degeneration problem in sequential recommendation. WSDM, 2022.] ......
解决cURL error 60: SSL certificate problem: unable to get local issuer certifica
转载:[](https://blog.csdn.net/qq_38776443/article/details/125202116) 报错原因:因为没有配置信任的服务器HTTPS验证。默认情况下,cURL被设为不信任任何CAs,因此浏览器无法通过HTTPs访问你服务器。 #### 一、解决方式 [下 ......
Git 的SSL certificate problem: unable to get local issuer certificate问题
D:\temp>git clone https://github.com/xxxxxx/yyyyyy.git Cloning into 'yyyyyy'... fatal: unable to access 'https://github.com/xxxxxx/yyyyyy.git/': SSL c ......
AtCoder Beginner Contest 225 F String Cards
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc225_f "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc225/tasks/abc225_f "AtCoder 传送门") 这题是真的强。。 ......
AtCoder Beginner Contest 225 G X
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc225_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc225/tasks/abc225_g "AtCoder 传送门") 感觉是一种很新的建 ......
AtCoder Beginner Contest 281 Ex Alchemy
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc281_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc281/tasks/abc281_h "AtCoder 传送门") 考虑设 $f_i$ ......
AtCoder Beginner Contest 287 G Balance Update Query
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc287_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc287/tasks/abc287_g "AtCoder 传送门") 线段树上二分入门题 ......
AtCoder Beginner Contest 258 G Grid Card Game
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc259_g "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc259/tasks/abc259_g "AtCoder 传送门") 记 $b_i = ......
AtCoder Regular Contest 145
### [A](https://atcoder.jp/contests/arc145/tasks/arc145_a) 答案为 `Yes` 当且仅当 $s[1] \ne $ `A` 或 $s[n] \ne $ `B`。 注意判 $n = 2$。 ### [B](https://atcoder.jp/c ......
AtCoder Beginner Contest 304 ABCDE
[AtCoder Beginner Contest 304](https://atcoder.jp/contests/abc304) ![image](https://img2023.cnblogs.com/blog/2458891/202306/2458891-20230604120319565- ......
w task2 - problem and solution
Read and understand the question -highlight / underline key parts causes ... solutions your opinion I believe ... Introduction: variety of reasons, st ......
AtCoder Beginner Contest 304
## [A - First Player (abc304 a)](https://atcoder.jp/contests/abc304/tasks/abc304_a) ### 题目大意 依次给定每个人的姓名和年龄,排成一圈。从年龄最小的人依次输出姓名。 ### 解题思路 找到年龄最小的,依次输出就好 ......
P1001 A+B Problem
## 题目描述
输入两个整数 $a, b$,输出它们的和($|a|,|b| \le {10}^9$)。
注意
1. Pascal 使用 `integer` 会爆掉哦!
2. 有负数哦!
3. C/C++ 的 main 函数必须是 `int` 类型,而且 C 最后要 `return 0`。这不仅... ......
AtCoder Beginner Contest 214 H Collecting
[洛谷传送门](https://www.luogu.com.cn/problem/AT_abc214_h "洛谷传送门") [AtCoder 传送门](https://atcoder.jp/contests/abc214/tasks/abc214_h "AtCoder 传送门") 好毒瘤啊…… 首先 ......