so it seems like many people are struggling to be red

I THINK THIS because you cant even write code

learn from the true red, this is how we write code https://mirror.codeforces.com/contest/4/submission/203467882

also people like Um_nik cant even be 1st because like they dont even know wavelet tree??? like it is so easy just make a tree

also a lot of people struggle to get to YELLOW which is the easiest rate to achieve,, because they write recursive segmant tree?? honestly go learn how to code...