I think they are cheated↵
https://codeforces.net/contest/1850/submission/214920611;↵
https://codeforces.net/contest/1850/submission/214917143;↵
https://codeforces.net/contest/1850/submission/214868771;↵
https://codeforces.net/contest/1850/submission/214868771↵
and more↵
[user:SlavicG,2023-07-22]
https://codeforces.net/contest/1850/submission/214920611;↵
https://codeforces.net/contest/1850/submission/214917143;↵
https://codeforces.net/contest/1850/submission/214868771;↵
https://codeforces.net/contest/1850/submission/214868771↵
and more↵
[user:SlavicG,2023-07-22]