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\n\r\n\n → Attention\n
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\n \r\n The package for this problem was not updated by the problem writer or Codeforces administration after we've upgraded the judging servers. To adjust the time limit constraint, a solution execution time will be multiplied by 2. For example, if your solution works for 400 ms on judging servers, then the value 800 ms will be displayed and used to determine the verdict.\r\n
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\n\r\n\r\n\n | Codeforces Beta Round 14 (Div. 2) | \n
|---|
| Finished | \n
\n
\n\r\n\r\n\n → Practice?\n
\n\n
\n \r\n
\r\n \r\n Want to solve the contest problems after the official contest ends? Just register for practice and you will be able to submit solutions.\r\n
\r\n\r\n \r\n \r\n
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\n\r\n\r\n\n → Virtual participation \r\n\n
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\n \r\n
\r\n \r\n \r\n Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ICPC mode for virtual contests.\n\nIf you've seen these problems, a virtual contest is not for you - solve these problems in the archive.\n\nIf you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.\n\nNever use someone else's code, read the tutorials or communicate with other person during a virtual contest.\r\n
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\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n→ Problem tags\n
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\n \r\n\n
\r\n \n\r\n brute force\r\n\r\n
\n\n \n\r\n constructive algorithms\r\n\r\n
\n\n \n\r\n geometry\r\n\r\n
\n\n \n\r\n implementation\r\n\r\n
\n\n \n\r\n math\r\n\r\n
\n\n \n\r\n *1700\r\n\r\n
\n \r\n No tag edit access\r\n
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→ Contest materials\n
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\n- \r\n
- \r\n\r\nAnnouncement\r\n\r\n\r\n
![](\"//codeforces.org/s/73366/images/icons/close-10x10.png\"\r\nstyle=\"position:)
\r\n\r\n\r\n \r\n - \r\n\r\nTutorial\r\n\r\n\r\n\r\n\r\n\r\n \r\n
![\"TON\"](\"//codeforces.org/s/73366/images/ton-100x100.png\" "\\"TON\\"/")
![\"ΠΠ’ΠΠ\"](\"//codeforces.org/s/73366/images/itmo_small_en-logo.png\" "\\"ΠΠ’ΠΠ\\"/"){kind=logo}
![](\"//codeforces.org/s/73366/images/icons/control.png\"/){kind=icon}
\n\n ![](\"//codeforces.org/s/73366/images/icons/control-270.png\"/){kind=icon}
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