Leak solution link of number C. Bun Lover https://youtu.be/PK27JkDUq58

Incase the cheater delete the video from youtube, for this reason I downloaded and stored it: Link

Some cheater:

https://mirror.codeforces.com/contest/1822/submission/203341284 (vothikimtrang0610)

https://mirror.codeforces.com/contest/1822/submission/203341760 (toriqul07)

https://mirror.codeforces.com/contest/1822/submission/203337437 (mishra_729)

https://mirror.codeforces.com/contest/1822/submission/203339721 (kmanikanta335)

https://mirror.codeforces.com/contest/1822/submission/203337206 (Unpredictable_Coder)

https://mirror.codeforces.com/contest/1822/submission/203338592 (NUll_0_ZERO)

https://mirror.codeforces.com/contest/1822/submission/203337275 (_Ali2002)

https://mirror.codeforces.com/contest/1822/submission/203337979 (vignanchintala)

https://mirror.codeforces.com/contest/1822/submission/203339037 (RishabhRawatt)

https://mirror.codeforces.com/contest/1822/submission/203340194 (Code_Dactor-lol)

https://mirror.codeforces.com/contest/1822/submission/203333829 (mohamed.ramadan__)

https://mirror.codeforces.com/contest/1822/submission/203331409 (sachinshinde603eight)

https://mirror.codeforces.com/contest/1822/submission/203338800 (Dineshhh)

https://mirror.codeforces.com/contest/1822/submission/203343647 (Solarine)

https://mirror.codeforces.com/contest/1822/submission/203334186 (uttam_19)

https://mirror.codeforces.com/contest/1822/submission/203339585 (pushpakkaloge)

https://mirror.codeforces.com/contest/1822/submission/203334269 (Homitha)

https://mirror.codeforces.com/contest/1822/submission/203337910 (abu_sayeed_2.0)

https://mirror.codeforces.com/contest/1822/submission/203335818 (Zagros901)

https://mirror.codeforces.com/contest/1822/submission/203340718 (Mokresh)

https://mirror.codeforces.com/contest/1822/submission/203339769 (pineapple_pasta)

https://mirror.codeforces.com/contest/1822/submission/203340203 (Soham_794)

https://mirror.codeforces.com/contest/1822/submission/203341540 (jubair7)

https://mirror.codeforces.com/contest/1822/submission/203336582 (inferno_vn)

https://mirror.codeforces.com/contest/1822/submission/203335230 (adavid)

https://mirror.codeforces.com/contest/1822/submission/203341418 (Sherif_Mesbah1)

https://mirror.codeforces.com/contest/1822/submission/203343130 (Inni_69)

https://mirror.codeforces.com/contest/1822/submission/203336411 (mohamed_orfy)

https://mirror.codeforces.com/contest/1822/submission/203340288 (LifeIsHere_Code)

https://mirror.codeforces.com/contest/1822/submission/203339713 (Sushumna_24)

https://mirror.codeforces.com/contest/1822/submission/203335236 (huseinlihuseyn09)

https://mirror.codeforces.com/contest/1822/submission/203335179 (SnehaDave)

https://mirror.codeforces.com/contest/1822/submission/203337344 (AbhishekShirke)

https://mirror.codeforces.com/contest/1822/submission/203338599 (aarjavjain29)

https://mirror.codeforces.com/contest/1822/submission/203342839 (AR_aban0ub)

https://mirror.codeforces.com/contest/1822/submission/203334460 (gnut)

https://mirror.codeforces.com/contest/1822/submission/203338322 (himanshutembhe)

https://mirror.codeforces.com/contest/1822/submission/203337394 (LoveLakhera)

https://mirror.codeforces.com/contest/1822/submission/203340054 (d_pan)

https://mirror.codeforces.com/contest/1822/submission/203343684 (Tohed812)

https://mirror.codeforces.com/contest/1822/submission/203340096 (HieuCuber05)

https://mirror.codeforces.com/contest/1822/submission/203338592 (NUll_0_ZERO)

https://mirror.codeforces.com/contest/1822/submission/203335991 (monk9)

https://mirror.codeforces.com/contest/1822/submission/203338516 (10_Not_Found)

https://mirror.codeforces.com/contest/1822/submission/203337275 (_Ali2002)

https://mirror.codeforces.com/contest/1822/submission/203335513 (KenKaneki_0_0)

https://mirror.codeforces.com/contest/1822/submission/203338800 (Dineshhh)

https://mirror.codeforces.com/contest/1822/submission/203334373 (0_pixel)

https://mirror.codeforces.com/contest/1822/submission/203339400 (Teflon004)

https://mirror.codeforces.com/contest/1822/submission/203336872 (ANON7MOUS)

All of them submit solution after video published in youtube. Their solution/implementation is same as the video was leaked. Some of them just change language/variables. MikeMirzayanov , Una_Shem look into this issue and take action against them.

UPD: Half Century of Cheaters!