They seem pretty popular among the top coders.
They dont have english editorials and no idea about russian editorials.
Who are you ?
Where is @aryanc403 who uses Russian editorials for long challenge ??
I’ve practiced one or two the ASC on the CF, these problem are really great, but I don’t find enough editorials for me to understand some of the solutions. As a Chinese, we also have the same high-quality problem in BZOJ, and the editorials is very rich and detailed, so I usually practice in BZOJ.