The initial arrangement size:
The arrangement size:
   |V| = 48,  |E| = 78,  |F| = 32
Removing C[0]: 18 edges have been removed.
The arrangement size:
   |V| = 46,  |E| = 60,  |F| = 16
After edge split:
The arrangement size:
   |V| = 47,  |E| = 61,  |F| = 16
After edge merge:
The arrangement size:
   |V| = 46,  |E| = 60,  |F| = 16
