---
id: TASK-37
title: 'Разбор задачи: Same Tree (Extra)'
status: Done
assignee:
  - '@assistant'
created_date: '2026-09-10 07:51'
updated_date: '2026-09-10 10:51'
labels: []
dependencies: []
references:
  - applications/yandex-codenv/algo-solutions/_template.md
priority: low
type: task
ordinal: 37000
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
Файл: algo-solutions/extra/07-same-tree.md. Easy, рекурсия.
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## Acceptance Criteria
<!-- AC:BEGIN -->
- [x] #1 Файл создан со всеми секциями формата
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## Implementation Plan

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1. Create `extra/07-same-tree.md` in algo-solutions/
2. Fill all required sections per template:
   - YAML frontmatter (title, difficulty=Easy, category=Tree/DFS, leetcode_id=100)
   - Condition, key idea, complexity
   - Ruby solution (recursive DFS)
   - Step-by-step walkthrough, edge cases, common mistakes, alternatives
3. Verify acceptance criterion: file exists with all required sections
4. Commit
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## Implementation Notes

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Решение проверено исполнением Ruby: 6 утверждений (все примеры из условия + edge cases: оба nil, одно nil, одиночный узел) прошли. Файл: applications/yandex-codenv/algo-solutions/extra/07-same-tree.md.
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## Final Summary

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Created `extra/07-same-tree.md` for LeetCode 100 (Same Tree, Easy). All required sections filled: YAML frontmatter, condition, key idea (recursive DFS), O(n)/O(h) complexity, Ruby solution, step-by-step walkthrough, 5 edge cases, 4 common mistakes, alternatives table. Verified by running Ruby code against 6 assertions (examples + edge cases).
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