A blog about programming, technology, and life.https://egrecho47.top/https://egrecho47.top/posts/a-brief-discussion-on-vector-databases/https://egrecho47.top/posts/a-brief-discussion-on-vector-databases/简略介绍两类向量数据库索引技术，探讨如何高效地存储和查询大量向量数据Thu, 19 Dec 2024 16:50:15 GMThttps://egrecho47.top/posts/life/%E5%85%B3%E4%BA%8E%E4%B8%80%E6%8A%8A%E7%9B%B4%E5%BE%84-125-%E5%8E%98%E7%B1%B3%E7%9A%84%E4%BC%9E/https://egrecho47.top/posts/life/%E5%85%B3%E4%BA%8E%E4%B8%80%E6%8A%8A%E7%9B%B4%E5%BE%84-125-%E5%8E%98%E7%B1%B3%E7%9A%84%E4%BC%9E/我喜欢拿着一把直径 125 厘米的伞在暴雨中散步Wed, 04 Oct 2023 22:28:25 GMThttps://egrecho47.top/posts/notes/math-basis-of-ai/https://egrecho47.top/posts/notes/math-basis-of-ai/AI 的数学基础学习笔记，涵盖距离、概率等概念Fri, 28 Jul 2023 11:32:36 GMThttps://egrecho47.top/posts/solutions/p1587-noi2016%E5%BE%AA%E7%8E%AF%E4%B9%8B%E7%BE%8E/https://egrecho47.top/posts/solutions/p1587-noi2016%E5%BE%AA%E7%8E%AF%E4%B9%8B%E7%BE%8E/NOI2016 problem solution - counting fractions that form repeating decimals in k-base number systemSun, 28 May 2023 00:03:10 GMThttps://egrecho47.top/posts/notes/exlucas/https://egrecho47.top/posts/notes/exlucas/扩展卢卡斯定理学习笔记，解决模非质数时的组合数计算问题Wed, 24 May 2023 18:42:43 GMThttps://egrecho47.top/posts/notes/odd-expressions-in-swift/https://egrecho47.top/posts/notes/odd-expressions-in-swift/Swift 语言中奇特语法表达式的笔记Wed, 24 May 2023 18:34:55 GMThttps://egrecho47.top/posts/life/three-good-things/https://egrecho47.top/posts/life/three-good-things/《大学生心理健康》例行作业：每周的三件好事Sun, 16 Apr 2023 23:03:45 GMThttps://egrecho47.top/posts/about-my-new-blog/https://egrecho47.top/posts/about-my-new-blog/关于我的新博客的一些思考和感悟，以及对过去和未来的反思Wed, 08 Mar 2023 13:08:24 GMThttps://egrecho47.top/posts/solutions/abc285ex-avoid-square-number/https://egrecho47.top/posts/solutions/abc285ex-avoid-square-number/Solution for ABC285Ex - using inclusion-exclusion principle and generating functions to count arrangements without square numbersSat, 11 Feb 2023 10:57:27 GMThttps://egrecho47.top/posts/contests/01-28%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/01-28%E6%A8%A1%E6%8B%9F%E8%B5%9B/01-28 模拟赛总结Thu, 28 Jan 2021 22:00:00 GMThttps://egrecho47.top/posts/solutions/p5339-tjoi2019%E5%94%B1%E8%B7%B3rap%E5%92%8C%E7%AF%AE%E7%90%83/https://egrecho47.top/posts/solutions/p5339-tjoi2019%E5%94%B1%E8%B7%B3rap%E5%92%8C%E7%AF%AE%E7%90%83/TJOI2019 problem solution - counting valid queue arrangements without specific consecutive patternsFri, 22 Jan 2021 09:50:00 GMThttps://egrecho47.top/posts/notes/polynomial/https://egrecho47.top/posts/notes/polynomial/多项式算法学习笔记，包括 NTT、FFT 等Tue, 01 Dec 2020 22:00:00 GMThttps://egrecho47.top/posts/contests/11-22%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/11-22%E6%A8%A1%E6%8B%9F%E8%B5%9B/11-22 模拟赛笔记Sun, 22 Nov 2020 22:00:00 GMThttps://egrecho47.top/posts/contests/11-21%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/11-21%E6%A8%A1%E6%8B%9F%E8%B5%9B/11-21 模拟赛总结Sat, 21 Nov 2020 22:00:00 GMThttps://egrecho47.top/posts/contests/11-17%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/11-17%E6%A8%A1%E6%8B%9F%E8%B5%9B/11-17 模拟赛题解Tue, 17 Nov 2020 22:00:00 GMThttps://egrecho47.top/posts/contests/10-30%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/10-30%E6%A8%A1%E6%8B%9F%E8%B5%9B/10-30 模拟赛题解Fri, 30 Oct 2020 22:00:00 GMThttps://egrecho47.top/posts/solutions/p5007-ddosvoid%E7%9A%84%E7%96%91%E6%83%91/https://egrecho47.top/posts/solutions/p5007-ddosvoid%E7%9A%84%E7%96%91%E6%83%91/Tree problem solution - calculating contribution of elements in sets without ancestor-descendant relationshipsSat, 10 Oct 2020 15:21:00 GMThttps://egrecho47.top/posts/notes/oi-note/https://egrecho47.top/posts/notes/oi-note/OI 竞赛随手笔记，包含算法技巧和解题心得Thu, 01 Oct 2020 16:09:59 GMThttps://egrecho47.top/posts/solutions/p4550-%E6%94%B6%E9%9B%86%E9%82%AE%E7%A5%A8/https://egrecho47.top/posts/solutions/p4550-%E6%94%B6%E9%9B%86%E9%82%AE%E7%A5%A8/Solution for stamp collecting problem - expected value dynamic programmingFri, 28 Aug 2020 10:16:00 GMThttps://egrecho47.top/posts/solutions/p3166-cqoi2014%E6%95%B0%E4%B8%89%E8%A7%92%E5%BD%A2/https://egrecho47.top/posts/solutions/p3166-cqoi2014%E6%95%B0%E4%B8%89%E8%A7%92%E5%BD%A2/CQOI 2014 problem solution - counting triangles in n×m grid using combinatoricsWed, 12 Aug 2020 16:58:00 GMThttps://egrecho47.top/posts/solutions/p1850-%E6%8D%A2%E6%95%99%E5%AE%A4/https://egrecho47.top/posts/solutions/p1850-%E6%8D%A2%E6%95%99%E5%AE%A4/Solution for classroom switching problem - dynamic programming with probability and shortest pathWed, 12 Aug 2020 16:13:00 GMThttps://egrecho47.top/posts/contests/10-28%E6%A8%A1%E6%8B%9F%E8%B5%9B/https://egrecho47.top/posts/contests/10-28%E6%A8%A1%E6%8B%9F%E8%B5%9B/10-28 模拟赛题解Tue, 28 Jan 2020 22:00:00 GMThttps://egrecho47.top/posts/notes/linux%E6%8A%98%E8%85%BE%E7%AC%94%E8%AE%B0/https://egrecho47.top/posts/notes/linux%E6%8A%98%E8%85%BE%E7%AC%94%E8%AE%B0/Linux 系统折腾记录，包含配置和优化笔记Thu, 02 Jan 2020 22:00:00 GMT