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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Timus Online Judge. Problem 1056</title><link rel="stylesheet" type="text/css" href="%E6%95%B0%E5%9E%8BDP00_files/style.css"><link rel="stylesheet" type="text/css" href="%E6%95%B0%E5%9E%8BDP00_files/style.css"><link rel="shortcut icon" type="image/x-icon" href="http://acm.timus.ru/favicon.ico"></head><body vlink="#1a5cc8" alink="#1a5cc8" link="#1a5cc8"><table width="100%" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td><table style="border: 1px solid rgb(26, 92, 200);" width="100%" bgcolor="#ffffff" cellpadding="1" cellspacing="0"><tbody><tr><td colspan="4" align="center" bgcolor="#1a5cc8"><font size="5" color="White">Timus Online Judge</font></td></tr><tr><td valign="top" width="130" align="center"><a href="http://www.usu.ru/index_eng.html"><img src="%E6%95%B0%E5%9E%8BDP00_files/usu-summer.jpg" alt="Ural State University" border="0"></a><br><a href="http://acm.timus.ru/problem.aspx?space=1&num=1056&locale=en">English</a><br><a href="http://acm.timus.ru/problem.aspx?space=1&num=1056&locale=ru">Russian</a><br></td><td valign="top" width="200" align="left"><div style="font-family: Arial,Helvetica,sans-serif; font-style: normal; font-variant: normal; font-weight: normal; font-size: 1.19em; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none; text-align: center;">Online Judge</div><a href="http://acm.timus.ru/">About</a><br><a href="http://acm.timus.ru/submit.aspx">Submit solution</a><br><a href="http://acm.timus.ru/problemset.aspx">Problem set</a><br><a href="http://acm.timus.ru/status.aspx">Judge status</a><br><a href="http://acm.timus.ru/forum/">Webboard</a><br><a href="http://acm.timus.ru/help.aspx?topic=faq">FAQ</a><br><a href="http://acm.timus.ru/help.aspx?topic=links">Links</a><br></td><td valign="top" width="200" align="left"><div style="font-family: Arial,Helvetica,sans-serif; font-style: normal; font-variant: normal; font-weight: normal; font-size: 1.19em; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none; text-align: center;">Authors</div><a href="http://acm.timus.ru/register.aspx">Register</a><br><a href="http://acm.timus.ru/authedit.aspx">Update your info</a><br><a href="http://acm.timus.ru/ranklist.aspx">Authors ranklist</a><br><form action="/search.aspx" method="get" style="margin-top: 0.6em;"><input name="Str" size="15" value=""> <input value="Search" type="submit"></form></td><td valign="top" width="200" align="left"><div style="font-family: Arial,Helvetica,sans-serif; font-style: normal; font-variant: normal; font-weight: normal; font-size: 1.19em; line-height: normal; font-size-adjust: none; font-stretch: normal; -x-system-font: none; text-align: center;">Online contests</div><a href="http://acm.timus.ru/contest.aspx">Current Contest</a><br><a href="http://acm.timus.ru/schedule.aspx">Scheduled contests</a><br><a href="http://acm.timus.ru/archive.aspx">Archive</a><br></td></tr></tbody></table></td></tr><tr><td style="padding-top: 32px; padding-bottom: 20px;"><table align="center" cellpadding="0" cellspacing="0"><col width="800"><tbody><tr><td><h2 class="problem_title">1056. Computer net</h2><div class="problem_limits">Time Limit: 2.0 second<br>Memory Limit: 16 MB<br></div><div id="problem_text"><h3 class="problem_subtitle">Background</h3><div class="problem_par"><div class="problem_par_normal">Computer
net is created by consecutive computer plug-up to one that has already
been connected to the net. Each new computer gets an ordinal number,
but the protocol contains the number of its parent computer in the net.
Thus, protocol consists of several numbers; the first of them is always
1, because the second computer can only be connected to the first one,
the second number is 1 or 2 and so forth. The total quantity of numbers
in the protocol is <i>N</i>鈭⌨️ 快捷键说明
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