Disjoint set

[hildjj]

No description provided.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 85.54217% with 12 lines in your changes missing coverage. Please review.

Project coverage is 95.13%. Comparing base (95906a8) to head (c2d77e4).

Files with missing lines	Patch %	Lines
day18.ts	75.67%	9 Missing ⚠️
lib/rect.ts	93.47%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #36      +/-   ##
==========================================
- Coverage   95.46%   95.13%   -0.33%     
==========================================
  Files          24       24              
  Lines        3090     3148      +58     
  Branches      611      632      +21     
==========================================
+ Hits         2950     2995      +45     
- Misses        138      151      +13     
  Partials        2        2              

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