Hello Everyone, So today I received a message stating my submission 154312137 for the problem 1669C coincides with my own solution for 154313380 for the problem 1669C. Actually, since there was a very large queue I submitted my solution twice , once from the codeforces main site and then from m1.codeforces site. MikeMirzayanov Please look into the matter.
don't worry , I had the same issue https://mirror.codeforces.com/blog/entry/102171
also check this comment :
https://mirror.codeforces.com/blog/entry/102053?#comment-906182
Ohh okk thank god !
you're welcome
The system is a bit dumb because it cannot recognize two submissions by the same account !