BelkaCTF #6: Bogus Bill

BelkaCTF #6 is over, the gang of money forgers is all caught. Thank you for being a part of this! Congratulations to the winners:
Student track: its5Q, belkakaka, kiwi
Professional track: sinsa, sm233, teo4n6

đź“„ BelkaCTF #6: Bogus Bill write-up

Bonus
40		 Mid-Event
Solved 30 times

Now it's your chance to earn some bonus points!

To earn +40 extra points, post your current standing on your LinkedIn account and submit the link as the flag.

Your post must contain both hashtags #Belkasoft and #BelkaCTF, and must remain live until the CTF's conclusion.
Flag:


100 100 100 127 100 208 643 40 286 357 603 438 438 315 357 579 691 829 590 50