First get into Codeforces.Click the botton of 'PROBLEMSET'.Next, click the 'SUBMIT' botton.Write your name on the text box next to 'PROBLEM'.Press enter key.Than you'll see some big bug.You cannot do it now :( ==========================================================================================================================================================================================****https://mirror.codeforces.com/db941c/ 2024-07-16 082710.png
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Auto comment: topic has been updated by zhuhaocheng (previous revision, new revision, compare).