<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
xmlns:content="http://purl.org/rss/1.0/modules/content/"
xmlns:wfw="http://wellformedweb.org/CommentAPI/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:atom="http://www.w3.org/2005/Atom"
xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
xmlns:slash="http://purl.org/rss/1.0/modules/slash/">
<channel>
    <title>Untitled - Code666 (代码贴、代码片段)</title>
    <description>Untitled - Code666 (代码贴、代码片段)</description>
    <atom:link href="http://www.code666.cn/view/rss/4ccd62b1" rel="self" type="application/rss+xml" />
    <link>http://www.code666.cn/</link>
    <language>en</language>
<item>
    <title>Re: Untitled</title>
    <link>http://www.code666.cn/view/2b42ad43</link>
    <pubDate>Sat, 07 Jan 2023 15:39:52 +0800</pubDate>
    <dc:creator>Sharp Hog</dc:creator>
    <guid isPermaLink="false">http://www.code666.cn/view/2b42ad43</guid>
    <description><![CDATA[#include &lt;iostream&gt; #include &lt;cstring&gt; using namespace std; const int N = 1e6; int prime[N+5]; bool is_prime[N+5]; void sieve(void); int main() { sieve(); int n; while (scanf(&quot;%d&quot;,&amp;n)!=EOF)&#8230;]]></description>
    <content:encoded><![CDATA[<div class="text" style="font-family:monospace;"><ol><li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">#include &lt;iostream&gt;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">#include &lt;cstring&gt;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">using namespace std;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">const int N = 1e6;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">int prime[N+5];</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">bool is_prime[N+5];</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">void sieve(void);</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">int main()</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">{</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; sieve();</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; int n;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; while (scanf(&quot;%d&quot;,&amp;n)!=EOF)</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; {</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; cout &lt;&lt; prime[n] &lt;&lt; endl; </div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; }</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">}</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">void sieve()</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">{</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; int p = 0;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; memset(is_prime,true,sizeof(is_prime));</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; is_prime[0] = is_prime[1] = false;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; for (int i=2;i&lt;=N;i++)</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; {</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; if (is_prime[i])</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; {</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; prime[p++] = i;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; for (int j=i*i;j&lt;=N;j+=i) is_prime[j] = false;</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; &nbsp; &nbsp; }</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">&nbsp; &nbsp; }</div></li>
<li style="font-weight: normal; vertical-align:top;"><div style="font: normal normal 1em/1.2em monospace; margin:0; padding:0; background:none; vertical-align:top;">}</div></li>
</ol></div>]]></content:encoded>
</item>
</channel>
</rss>
