[user:https://mirror.codeforces.com/profile/iulia.ela.morariu] and [user:https://mirror.codeforces.com/profile/morariu.tudor] have the same solutions and they submitted them at a very short time interval and they are brothers
Proof :
problem A : [user:https://mirror.codeforces.com/contest/1668/submission/154092169] and [submission:https://mirror.codeforces.com/contest/1668/submission/154090355]
problem B : [submission:https://mirror.codeforces.com/contest/1668/submission/154120658] and [submission:https://mirror.codeforces.com/contest/1668/submission/154119135]
problem C : [submission:https://mirror.codeforces.com/contest/1668/submission/154128003] and [submission:https://mirror.codeforces.com/contest/1668/submission/154124072]
[user:https://mirror.codeforces.com/profile/MikeMirzayanov] please do something because this is not the first time they cheat and sometimes they get skipped