I went to izho.kz but I couldn't find any details on contest environment. I tried to contact through whatsapp but they aren't replying. If you know about the details or someone who knows, please let me know.

Things that I want know :

• Operating system of contestants computer and IDE
• Will there be any interactive problems?
• Will they use graders in each problem like IOI where you have that grader.cpp?
• How will they manage translations? Will they use markdown language, like IOI, or just give handwritten papers?

Find number of unique longest increasing subsequence in array a.
Constraints : 1 <= Lenght of a <= 5000, 0 < a[i] < 2^31
Example input :
4
1 2 2 3
Example output :
1
Help me :v.