CTF Challenge: ARMssembly 2

Challenge Overview:

• This was the following description for the challenge.
  

Attached file:

• I’ve included the comments to kinda help understand the assembly, but what is important is that; i have been able to identify it as loop.
• But essentially, it checks if initially zero is less that the given input which is 2403814618 for which the zero will increment until the condition is false.
• The main function is not helpful in this case.

The flag: