so the first thing abnormal about this guy nxsang1611 here is getting +rating even after his 4 submissions got skipped below
the second thing is in the last Pinely Round 4 (D1 + D2), his submission for problem D (273211548) is very similar to these 5 below: 273223919
273210945 (note that this was submitted before nxsang1611's)
273219450
273219655
273220349
at this moment I can conclude that this dude cheated
and finally, he's blue (expert I mean)
I would love Codeforces and sir MikeMirzayanov to consider getting his submissions in the Pinely Round 4 skipped after all of this
Thank you for your time here.