{"id":244,"date":"2010-05-08T12:47:00","date_gmt":"2010-05-08T04:47:00","guid":{"rendered":"http:\/\/localhost\/?p=244"},"modified":"2010-05-08T12:47:00","modified_gmt":"2010-05-08T04:47:00","slug":"ahoi2007_password_box","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=244","title":{"rendered":"[AHOI2007]\u5bc6\u7801\u7bb1"},"content":{"rendered":"<p> <a href=\"http:\/\/www.rqnoj.cn\/Problem_296.html\" target=\"_blank\">www.rqnoj.cn\/Problem_296.html<\/a><br \/>\u6211\u8fd9\u4e2a\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u5e94\u8be5\u662fLogN*Sqrt(N)..\u5c45\u7136AC\u4e86\u56e7\u3002\u3002\u3002<br \/>\u8fd9\u9898\u5c31\u662f\u6c42x*x%n==1\u7684\u89e3\u7684\u4e2a\u6570\uff0c<br \/>\u4e5f\u5c31\u662fn|(x+1)(x-1)..\u8bben=a*b\uff0ca&lt;b,\u679a\u4e3ea\uff0c\u90a3\u4e48\u53ef\u4ee5\u8003\u8651a|x+1&amp;&amp;b|x-1\u7684\u60c5\u51b5\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f\u5bf9\u79f0\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6309b\u7684\u500d\u6570\u679a\u4e3ex\uff0c\u7531\u4e8eb&gt;Sqrt(N)\u3002\u3002\u6545\u6700\u591aSqrt\uff08N\uff09\u4e2ax\uff0c\u7136\u540e\u7528\u4e2aset\u53bb\u91cd\u5c31OK\u4e86\u3002\u3002<br \/>Code\uff1a<br \/>#include &lt;vector&gt;<br \/>#include &lt;algorithm&gt;<br \/>#include &lt;utility&gt;<br \/>#include &lt;iostream&gt;<br \/>#include &lt;cstdio&gt;<br \/>#include &lt;cmath&gt;<br \/>#include &lt;cstdlib&gt;<br \/>#include &lt;set&gt;<br \/>#define rep(i,n) for(int i=0;i&lt;n;i++)<br \/>#define pb push_back<br \/>const int inf=~0U&gt;&gt;1;<br \/>using namespace std;<br \/>typedef long long ll;<br \/>typedef unsigned long long ull;<br \/>int main()<br \/>{<br \/>    \/\/freopen(&quot;in&quot;,&quot;r&quot;,stdin);<br \/>    ll n;cin&gt;&gt;n;set&lt;int&gt; S;<br \/>    for(int a=1;a*a&lt;=n;a++)<br \/>        if(n%a==0)<br \/>        {<br \/>            int b=n\/a;<br \/>            for(int x=1;x&lt;n;x+=b)<br \/>                if((x+1)%a==0)<br \/>                    S.insert(x);<br \/>            for(int x=b-1;x&lt;n;x+=b)<br \/>                if((x-1)%a==0)<br \/>                    S.insert(x);<br \/>        }<br \/>    for(set&lt;int&gt;::iterator i=S.begin();i!=S.end();i++)<br \/>        cout&lt;&lt;*i&lt;&lt;endl;<br \/>} <\/p>\n","protected":false},"excerpt":{"rendered":"<p>www.rqnoj.cn\/Problem_296.html\u6211\u8fd9\u4e2a\u7b97\u6cd5\u7684\u590d\u6742\u5ea6\u5e94\u8be5\u662fLogN*Sqrt(N)..\u5c45\u7136AC\u4e86\u56e7\u3002\u3002\u3002\u8fd9\u9898\u5c31\u662f\u6c42x*x%n==1\u7684\u89e3\u7684\u4e2a\u6570\uff0c\u4e5f\u5c31\u662fn|(x+1)(x-1)..\u8bben=a*b\uff0ca&lt;b,\u679a\u4e3ea\uff0c\u90a3\u4e48\u53ef\u4ee5\u8003\u8651a|x+1&amp;&amp;b|x-1\u7684\u60c5\u51b5\uff0c\u8fd8\u6709\u4e00\u4e2a\u662f\u5bf9\u79f0\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6309b\u7684\u500d\u6570\u679a\u4e3ex\uff0c\u7531\u4e8eb&gt;Sqrt(N)\u3002\u3002\u6545\u6700\u591aSqrt\uff08N\uff09\u4e2ax\uff0c\u7136\u540e\u7528\u4e2aset\u53bb\u91cd\u5c31OK\u4e86\u3002\u3002Code\uff1a#include &lt;vector&gt;#include &lt;algorithm&gt;#include &lt;utility&gt;#include &lt;iostream&gt;#include &lt;cstdio&gt;#include &lt;cmath&gt;#include &lt;cstdlib&gt;#include &lt;set&gt;#define rep(i,n) for(int i=0;i&lt;n;i++)#define pb push_backconst int inf=~0U&gt;&gt;1;using namespace std;typedef long long ll;typedef unsigned long long ull;int main(){ \/\/freopen(&quot;in&quot;,&quot;r&quot;,stdin); ll n;cin&gt;&gt;n;set&lt;int&gt; S; for(int a=1;a*a&lt;=n;a++) if(n%a==0) { int b=n\/a; for(int x=1;x&lt;n;x+=b) if((x+1)%a==0) S.insert(x); for(int x=b-1;x&lt;n;x+=b) if((x-1)%a==0) S.insert(x); } for(set&lt;int&gt;::iterator i=S.begin();i!=S.end();i++) cout&lt;&lt;*i&lt;&lt;endl;}<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/244"}],"collection":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=244"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/244\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}