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Merged
BrianLusina merged 3 commits into from
Jan 5, 2026
Merged

feat(algorithms, intervals): can attend meetings #142

BrianLusina merged 3 commits into from
Jan 5, 2026

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@BrianLusina
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@BrianLusina BrianLusina commented Jan 5, 2026 •
edited by coderabbitai bot
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Describe your change:

Can attend meetings interval algorithm challenge

  • Add an algorithm?
  • Fix a bug or typo in an existing algorithm?
  • Documentation change?

Checklist:

  • I have read CONTRIBUTING.md.
  • This pull request is all my own work -- I have not plagiarized.
  • I know that pull requests will not be merged if they fail the automated tests.
  • This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
  • All new Python files are placed inside an existing directory.
  • All filenames are in all lowercase characters with no spaces or dashes.
  • All functions and variable names follow Python naming conventions.
  • All function parameters and return values are annotated with Python type hints.
  • All functions have doctests that pass the automated testing.
  • All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
  • If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

Summary by CodeRabbit

  • New Features

    • Added an algorithm to check whether a person can attend all meetings without overlaps.

  • Documentation

    • Added documentation for the Can Attend Meetings problem, including definition, edge-case notes, and example scenarios.

  • Tests

    • Added parameterized unit tests covering multiple interval scenarios to validate correctness and edge cases.

✏️ Tip: You can customize this high-level summary in your review settings.

@BrianLusina BrianLusina self-assigned this Jan 5, 2026
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coderabbitai bot commented Jan 5, 2026 •
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Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

Adds a new "Can Attend Meetings" algorithm under Intervals with documentation, a Python implementation that detects overlapping intervals by sorting, and parameterized unit tests covering edge cases and typical scenarios.

Changes

Cohort / File(s) Summary
Documentation
DIRECTORY.md, algorithms/intervals/can_attend_meetings/README.md		 Added directory entry and README describing the problem, function contract, examples, and edge-case notes.
Algorithm Implementation
algorithms/intervals/can_attend_meetings/__init__.py		 Added can_attend_meetings(intervals: List[List[int]]) -> bool that sorts intervals by start time and checks for overlaps; handles empty input; docstring includes complexity and edge cases.
Unit Tests
algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py		 Added parameterized test cases covering empty, non-overlapping, overlapping, and boundary scenarios; test class and constant test dataset included.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Possibly related PRs

Suggested labels

enhancement, Algorithm, Datastructures, Documentation, Sorting, Array, Intervals

Poem

🐰 I sorted my hops from start to end,
No overlaps now, each meeting a friend.
With a skip and a nibble, timelines align—
Calendars peaceful, one carrot at a time! 🥕

Pre-merge checks and finishing touches

❌ Failed checks (1 warning)
Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. You can run @coderabbitai generate docstrings to improve docstring coverage.
✅ Passed checks (2 passed)
Check name Status Explanation
Title check ✅ Passed The title clearly summarizes the main change: adding a 'can attend meetings' algorithm to the intervals problem set.
Description check ✅ Passed The description includes all required sections with the change description and completed checklist items. All critical requirements are checked off and properly addressed.
📜 Recent review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ded01ef and 58a6208.

📒 Files selected for processing (1)
  • algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py

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coderabbitai bot reviewed Jan 5, 2026
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Actionable comments posted: 2

Fix all issues with AI Agents 🤖 
In @algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py:
- Around line 10-11: The test file contains a duplicate test tuple ([[7, 10],
[2, 4]], True) repeated twice; remove one of the identical entries from the test
cases list in test_can_attend_meetings.py so each test case is unique (leave a
single instance of the ([[7, 10], [2, 4]], True) tuple and delete the
duplicate).

In @DIRECTORY.md:
- Around line 134-135: Adjust the "Can Attend Meetings" entry so its list
indentation uses 2 spaces for the parent bullet and 4 spaces for the child link,
and update the link target from
algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py to
tests/algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py to
match the other test entries and maintain consistent directory references.
📜 Review details

Configuration used: defaults

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between e983f02 and ded01ef.

📒 Files selected for processing (4)
  • DIRECTORY.md
  • algorithms/intervals/can_attend_meetings/README.md
  • algorithms/intervals/can_attend_meetings/__init__.py
  • algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py
🧰 Additional context used
🧬 Code graph analysis (1)
algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py (1)
algorithms/intervals/can_attend_meetings/__init__.py (1)
  • can_attend_meetings (4-60)
🪛 markdownlint-cli2 (0.18.1)
DIRECTORY.md

134-134: Unordered list indentation
Expected: 2; Actual: 4

(MD007, ul-indent)

135-135: Unordered list indentation
Expected: 4; Actual: 6

(MD007, ul-indent)

🔇 Additional comments (3)
algorithms/intervals/can_attend_meetings/README.md (1)

1-23: LGTM! Clear and well-documented problem statement.

The documentation clearly explains the problem, provides helpful examples, and importantly specifies that meetings ending and starting at the same time do not conflict.

algorithms/intervals/can_attend_meetings/__init__.py (1)

4-60: LGTM! Excellent implementation with comprehensive documentation.

The implementation correctly:

  • Handles the edge case of empty input
  • Sorts intervals by start time for efficient overlap detection
  • Uses strict less-than (<) comparison at line 52, which properly allows adjacent meetings (end == start) to not conflict
  • Provides detailed complexity analysis in the docstring
  • Uses appropriate type hints
algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py (1)

1-29: Test file location is correct.

The current location algorithms/intervals/can_attend_meetings/test_can_attend_meetings.py is consistent with the project's testing convention. All test files throughout the repository are colocated with their corresponding implementation files within the algorithms/ directory structure (e.g., algorithms/arrays/intersection/test_intersection.py, algorithms/backtracking/combination/test_combination_2.py), not in a separate tests/ directory. The DIRECTORY.md entry correctly documents the test file at its actual location.

Likely an incorrect or invalid review comment.

@BrianLusina @coderabbitai
test(algorithms, intervals): remove duplicate test case
58a6208 
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
@BrianLusina BrianLusina merged commit be0e4fd into main Jan 5, 2026
4 of 7 checks passed
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