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Add stack, tree and backtracking problems

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评估

难度
3/5
预计耗时
1-2 天
新手友好度
76/100
Issue 类型
功能
描述清晰度
描述清楚
活跃度
活跃
领域
backend, testing

调研方向

Start with backend/arena/docs/problems.md, then inspect example JSON problems in backend/arena/problems/ and reference solutions in backend/arena/solutions/. Choose one stack, tree, or backtracking problem with supported input types, and add its JSON file plus independent JavaScript and Python references. Run cd backend && npm run validate:problems; done means validation passes and the topic tag makes the problem available in filters.

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描述

enhancement good first issue help wanted

Of the 45 problems, almost none use a stack, tree or backtracking. These are some of the most common interview topics and a natural fit for short battles.

Ideas that fit the gaming theme

  • Stack: matching combo inputs, undo history in a level editor, next stronger opponent in a queue.
  • Trees: a tournament bracket or guild hierarchy given as a parent array (integer[]), asking for depth, subtree totals or lowest common ancestor.
  • Backtracking: every squad of size k under a cost cap, or filling a small puzzle grid.

Trees must arrive as one of the supported input types (for example a parent array or an edge list as [integer, integer][]), since drivers do not build node objects.

How to add one

Follow backend/arena/docs/problems.md: one JSON file in backend/arena/problems/ and independent JavaScript and Python references in backend/arena/solutions/.

Definition of done

  • cd backend && npm run validate:problems passes.
  • Tags include the topic (stack, trees or backtracking) so it shows up in filters.
  • Easy or medium difficulty is welcome; this is a good first problem to write.
主要语言
JavaScript
星标
0
派生
2
PR 合并指标
30 天内没有已合并 PR

环境准备

  • 没有 Dockerfile 或 Docker Compose 文件
  • 没有 Pull Request 模板
  • 阅读贡献指南

从这里开始

  1. 先读完整个 Issue,再读项目的贡献指南。
  2. 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
  3. Fork 仓库,在一个分支上完成修改。
  4. 提交 Pull Request,并在描述里引用这个 Issue 编号。

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