feat: add biweekly contest 130

[yanglbme]

No description provided.

[idoocs]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 73.1%, saving 32.43 KB.

Filename	Before	After	Improvement	Visual comparison
solution/3100-3199/3142.Check if Grid Satisfies Conditions/images/changed.png	4.14 KB	655 bytes	-84.5%	View diff
solution/3100-3199/3142.Check if Grid Satisfies Conditions/images/example21.png	8.62 KB	1.18 KB	-86.3%	View diff
solution/3100-3199/3142.Check if Grid Satisfies Conditions/images/examplechanged.png	8.79 KB	1.24 KB	-85.9%	View diff
solution/3100-3199/3143.Maximum Points Inside the Square/images/3708-tc1.png	12.48 KB	4.89 KB	-60.8%	View diff
solution/3100-3199/3143.Maximum Points Inside the Square/images/3708-tc2.png	10.36 KB	4.01 KB	-61.3%	View diff

1860 images did not require optimisation.