# E869120/math-algorithm-book

拙著『「アルゴリズム×数学」が基礎からしっかり身につく本』（2021/12/25 発売）の GitHub ページです。演習問題の解答や、C++ 以外のソースコードなどが掲載されています。ぜひご活用ください。

Repository: https://github.com/E869120/math-algorithm-book
Canonical: https://ross.abutalabs.com/products/math-algorithm-book
Language: Java
License Family: other
Last push: 2022-08-11T20:40:07+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 1729, "days_push": 1483, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1162, forks 108 (observed 2026-08-28T04:03:49.483955+00:00)

## What it is
Companion repository for the Japanese book 'Algorithms x Math' (published December 2021), containing source code in C++, Python, Java, and C, solutions to end-of-chapter exercises, and an errata. It serves as supplementary learning material for studying algorithms and mathematics fundamentals.

## Use cases
- learn algorithms and math fundamentals from a book
- find solutions to algorithm textbook exercises
- study competitive programming basics for AtCoder
- compare algorithm implementations across C++, Python, Java, and C
- check errata for a Japanese algorithm textbook

## When to choose
- you own or plan to read the 'Algorithms x Math' book and want its code and answers
- you are preparing for AtCoder contests and want practice problems with solutions
- you want to see the same algorithms implemented in multiple languages

## When to avoid
- you want a standalone algorithm course without buying the book
- you need a general-purpose algorithm library to import into projects
- you need actively updated content - the repository is a static companion to a 2021 book

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: developer-tools
- domain: education, tutorials
- platform: cpp, python, jvm, c
- tags: competitive-programming, atcoder, algorithm-book, exercise-solutions, companion-code, algorithms

## Member repositories
- E869120/math-algorithm-book (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:49.483955+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:31:36.272118+00:00, confidence not recorded.
  - readme: https://github.com/E869120/math-algorithm-book (fetched 2026-08-28T04:03:49.483955+00:00, sha 55864060b2e6)
- Data as of 2026-08-30T08:39:29.467469+00:00.