Here are the statements of the 2019 SER D2 Problems.
And, here is the data and judges’ reference solutions:
Problem  Judge Data  Solutions  

Balanced Animals

animals_data  solutions  
Carryless Square Root

carryless_data  solutions  
Checkerboard

checkerboard_data  solutions  
From A to B

atob_data  solutions  
Elven Efficiency

elven_data  solutions  
Even or Odd

evenorodd_data  solutions  
Glow ,Pixel, Glow!

glowpixel_data  solutions  
Jumping Path

jumping_data  solutions  
Levenshtein

levenshtein_data  solutions  
Rainbow Strings

rainbow_data  solutions  
ReMorse

remorse_data  solutions 