Posts (180)

2026(4)

Sep 26, 2026

Sep 7, 2026

SIGYAO30 2026 @ Washington DC

Jun 13, 2026

半年生活碎碎念

Apr 29, 2026

Yosemite 二游记

2025(13)

Oct 8, 2025

Changelog - Introducing XenT

Sep 7, 2025

SIGYAO30 2025 @ Denver

Jun 20, 2025

Yosemite 小游记

Jun 3, 2025

Changelog - 网站小更新

May 23, 2025

Sum-free subset 老题

May 18, 2025

Ten Days in the Zed Editor

Mar 23, 2025

Integer and Rational Solutions of a Binary Quadratic Equation (0): General binary quadratic equation

Mar 21, 2025

Integer and Rational Solutions of a Binary Quadratic Equation (5): Binary quadratic form

Mar 14, 2025

Integer and Rational Solutions of a Binary Quadratic Equation (4): Pell equation and generalized Pell equation

Mar 10, 2025

Integer and Rational Solutions of a Binary Quadratic Equation (3): $ax^2+by^2=n$

Mar 9, 2025

Integer and Rational Solutions of a Binary Quadratic Equation (2): Quadratic Residue

Mar 7, 2025

Integer and Rational Solutions to a Binary Quadratic Equation (1): Legendre equation

Jan 5, 2025

六个解谜游戏

2024(16)

Dec 29, 2024

论 First Principle

Oct 20, 2024

The Optimal Order to Purchase Vampire Survivors Power Ups

Oct 12, 2024

Lake Tahoe 游记

Sep 29, 2024

Sep 25, 2024

Aug 27, 2024

夏威夷旅游小记

Jul 22, 2024

IMO 2024 P1 & P5

Jul 4, 2024

SIGYAO30 2024 @ Chicago

Jun 8, 2024

2024年新高考 1 卷数学最后一题

May 3, 2024

妙题一道（圆覆盖）

May 1, 2024

2023-09 回国小记

Apr 7, 2024

Apr 7, 2024

请选择你的司机

Feb 25, 2024

Manage Configurations: File Format

Feb 13, 2024

Manage Configurations: Intro

Jan 18, 2024

漫长的季节

2023(12)

Dec 31, 2023

Dec 4, 2023

跑路文案解读

Nov 9, 2023

某积性函数前缀和算法的复杂度分析

Nov 8, 2023

SIGYAO30 2023 @ Seattle

Jun 9, 2023

两个关于子段和的题

May 13, 2023

（特殊情况下）函数重载是 NP-complete 的

Apr 18, 2023

从 fair coin 说起

Mar 25, 2023

Extended Lucas theorem

Mar 16, 2023

探底排序的时间复杂度

Mar 12, 2023

Google Codejam 和 TCO 无了

Mar 11, 2023

闲聊《来自深渊》，《三体》（腾讯）和《三体》（艺画开天）

Jan 7, 2023

Changelog - 主题小更新

2022(7)

Dec 25, 2022

Dec 11, 2022

Nov 27, 2022

Jul 31, 2022

毕业（前）大旅行

May 25, 2022

Mar 22, 2022

Pre-Grad 四处浪小游记

Jan 22, 2022

吐槽几个 Rust 里写的不舒服的地方

2021(9)

Sep 25, 2021

墨西哥小旅游（二）

Aug 29, 2021

墨西哥小旅游（一）

Jun 1, 2021

整个花里胡哨的终端

May 30, 2021

折纸 — 柴犬

Apr 30, 2021

如何实现 exp 函数

Apr 6, 2021

Dirichlet series 与算术函数前缀和

Mar 15, 2021

解析方法数质数：从入门到入土（下）

Mar 7, 2021

解析方法数质数：从入门到入土（上）

Feb 22, 2021

2020(5)

Dec 26, 2020

再聊几个小游戏

Dec 13, 2020

Modulo by a Constant

Dec 1, 2020

SIGYAO30 文案解读

Oct 2, 2020

Jul 26, 2020

2017(2)

Dec 31, 2017

一个有趣的概率小问题

Jul 8, 2017

最近的一些小操作

2016(1)

Apr 6, 2016

UyHiP 2016 Feb Riddle

2015(3)

Dec 19, 2015

两个有趣的小题目

Dec 15, 2015

一段关于 $\pi$ 的代码

May 3, 2015

假期一除草

2014(10)

Aug 22, 2014

Jun 22, 2014

Jun 18, 2014

Across the Great Wall

May 31, 2014

May 2, 2014

APIO 2014 《抽象代数入门》

May 1, 2014

Apr 15, 2014

Untrusted 记录

Mar 7, 2014

2014 清华女生节特辑

Jan 30, 2014

Codeforces-326F

2013(88)

Nov 6, 2013

Nov 2, 2013

烟花八月上帝都

Nov 1, 2013

ProjectEuler 404 - Crisscross Ellipses

Oct 29, 2013

ProjectEuler-translating

Oct 15, 2013

ProjectEuler 440 - GCD and Tiling

Oct 8, 2013

ProjectEuler 439 - Sum of sum of divisors

Oct 1, 2013

ProjectEuler 356 - Largest roots of cubic polynomials

Sep 23, 2013

ProjectEuler 437 - Fibonacci primitive roots

Sep 16, 2013

ProjectEuler-436 - Unfair wager

Sep 11, 2013

TOAD 27 - Another Hat Problem

Sep 4, 2013

TOAD 34 - Odd goings on

Sep 2, 2013

$k$-th minimum in a circle

Aug 23, 2013

姚班招生题目

Aug 6, 2013

多校第五场

Aug 6, 2013

Sophomore-dream

Aug 5, 2013

ProjectEuler-419-421

Jul 9, 2013

Jun 29, 2013

Jun 29, 2013

纪念高中君

Jun 28, 2013

TOAD 8 - Here comes Santa

Jun 26, 2013

Google-Codejam-Round3-D-and-TopcoderOpen-Round3-Level3

Jun 21, 2013

$d$ 维球体 $k$ 远点期望

Jun 16, 2013

ProjectEuler 432 - Totient sum

Jun 9, 2013

Jun 6, 2013

ProjectEuler 430 - Range flips

Jun 4, 2013

Jun 3, 2013

Google Codejam Round 2 && POJ Challange Beta 1

May 31, 2013

TOAD 33 - Abduction

May 27, 2013

May 26, 2013

PE-429-and-HNU-A

May 23, 2013

TOAD 7 - The Gridville Garbash problem

May 19, 2013

无尽的远方，无数的人

May 17, 2013

TOAD 12 - Level with me

May 15, 2013

TOAD 21 - Searching for the truth

May 7, 2013

May 6, 2013

TOAD 24 - Fair Shares?

May 5, 2013

May 3, 2013

湖南卫视《成人礼》酱油记

May 3, 2013

Apr 29, 2013

Apr 25, 2013

TOAD 25 - Rational Creatures

Apr 23, 2013

Apr 18, 2013

Apr 17, 2013

TOAD 19 - Homework Scores

Apr 15, 2013

TOAD 3 - Take the Last Chip

Apr 13, 2013

Apr 12, 2013

TOAD 6 - Uniform Candy Distribution

Apr 12, 2013

Apr 11, 2013

Apr 11, 2013

TOAD 13 - The Voting Problem

Apr 10, 2013

TOAD 4 - Vacancy

Apr 9, 2013

TOAD 18 - Spiders and a Fly

Apr 8, 2013

Apr 7, 2013

Apr 7, 2013

TOAD 20 - Democracy

Apr 6, 2013

TOAD 37 - Zeroise Me

Apr 5, 2013

TOAD 2 - Lights of the Round Table

Apr 4, 2013

TOAD 5 - Empty the Bucket

Apr 2, 2013

Mar 31, 2013

Topcoder-OpenTopcoder-Round2A

Mar 30, 2013

Mar 30, 2013

Changelog - TeX-support

Mar 25, 2013

「进行中」Dynamic Minimum Spanning Tree

Mar 23, 2013

Mar 17, 2013

Mar 15, 2013

Mar 11, 2013

Codeforces-172 出题感想

Mar 10, 2013

Topcoder-OpenTopcoder-Round1C

Mar 10, 2013

Changelog - 主题更新

Mar 6, 2013

Mar 1, 2013

Feb 24, 2013

「完结」OI 生涯回忆录

Feb 21, 2013

Feb 20, 2013

Feb 17, 2013

Changjun-Online-Judge begins

Feb 16, 2013

Feb 14, 2013

Feb 13, 2013

Feb 12, 2013

Codeforces-166-div2

Feb 4, 2013

ID 那些事儿

Feb 1, 2013

Jan 31, 2013

WinterCamp-2013

Jan 23, 2013

Jan 21, 2013

Jan 20, 2013

Jan 14, 2013

Jan 13, 2013

Jan 5, 2013

2012(10)

Dec 28, 2012

Codeforces-158-div2

Dec 26, 2012

Dec 23, 2012

Dec 22, 2012

Dec 22, 2012

lambda and closure

Dec 19, 2012

Codeforces-178E3 人眼识别题

Dec 18, 2012

xhr 的奇思妙想

Dec 18, 2012

Dec 17, 2012

Dec 12, 2012