feat: add new lc problems

[yanglbme]

No description provided.

[idoocs]

Images automagically compressed by Calibre's image-actions ✨

Compression reduced images by 52%, saving 180.06 KB.

Filename	Before	After	Improvement	Visual comparison
solution/3600-3699/3619.Count Islands With Total Value Divisible by K/images/example1griddrawio-1.png	27.47 KB	8.13 KB	-70.4%	View diff
solution/3600-3699/3619.Count Islands With Total Value Divisible by K/images/example2griddrawio.png	13.97 KB	4.09 KB	-70.7%	View diff
solution/3600-3699/3620.Network Recovery Pathways/images/graph-10.png	11.20 KB	6.96 KB	-37.8%	View diff
solution/3600-3699/3620.Network Recovery Pathways/images/graph-11.png	12.47 KB	8.14 KB	-34.7%	View diff
solution/3600-3699/3623.Count Number of Trapezoids I/images/desmos-graph-5.png	36.47 KB	16.73 KB	-54.1%	View diff
solution/3600-3699/3623.Count Number of Trapezoids I/images/desmos-graph-6.png	43.32 KB	22.66 KB	-47.7%	View diff
solution/3600-3699/3623.Count Number of Trapezoids I/images/desmos-graph-7.png	38.17 KB	19.77 KB	-48.2%	View diff
solution/3600-3699/3623.Count Number of Trapezoids I/images/desmos-graph-8.png	41.26 KB	20.96 KB	-49.2%	View diff
solution/3600-3699/3625.Count Number of Trapezoids II/images/desmos-graph-3.png	39.99 KB	19.52 KB	-51.2%	View diff
solution/3600-3699/3625.Count Number of Trapezoids II/images/desmos-graph-4.png	45.32 KB	22.34 KB	-50.7%	View diff
solution/3600-3699/3625.Count Number of Trapezoids II/images/desmos-graph-5.png	36.47 KB	16.73 KB	-54.1%	View diff

2122 images did not require optimisation.