{"id":23,"date":"2009-11-14T14:05:00","date_gmt":"2009-11-14T06:05:00","guid":{"rendered":"http:\/\/localhost\/?p=23"},"modified":"2009-11-14T14:05:00","modified_gmt":"2009-11-14T06:05:00","slug":"spoj_2185","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=23","title":{"rendered":"SPOJ 2185"},"content":{"rendered":"<p> http:\/\/www.spoj.pl\/problems\/MUSIC\/<br \/>USACO\u4e0d\u77e5\u90a3\u5e74\u90a3\u6708\u7684\u6708\u8d5b\u9898\u3002\u3002\u3002<br \/>\u770b\u4e0a\u53bb\u5f88BT\u3002\u3002\u4f46\u5982\u679c\u770b\u4e00\u4e0b\u90e8\u5206\u548c\u7684\u8bdd\u3002\u3002<br \/>\u4f1a\u53d1\u73b0\u641e\u90a3\u4e48\u591a\u4e5f\u5c31\u662f\u4ea4\u6362Sx-1\u4e8eSy\u3002\u3002<br \/>\u8981\u8ba9\u6761\u4ef6\u6ee1\u8db3\u3002\u3002\u5fc5\u987b\u8981\u628a\u90e8\u5206\u548c\u987a\u5e8f\u6392\u5e8f\u3002\u3002\u5e76\u4e14S1&gt;0\u4ee5\u53ca\u6ca1\u6709\u76f8\u540c\u7684\u90e8\u5206\u548c\u3002\u3002<br \/>\u90a3\u4e48\u6700\u5c0f\u4ea4\u6362\u6570\u5c31\u662fn-\u8f6e\u6362\u6570\u3002\u3002\u5f88\u597d\u6c42\u3002\u3002<br \/>Code\u3002\u3002\u3002<br \/>#include&lt;cstdio&gt;<br \/>#include&lt;cstdlib&gt;<br \/>#include&lt;iostream&gt;<br \/>#include&lt;algorithm&gt;<br \/>const int maxn=100000;<br \/>using namespace std;<br \/>int S[maxn],P[maxn],n;<br \/>bool cmp(const int&amp;x,const int&amp;y)<br \/>{<br \/>return S[x]&lt;S[y];<br \/>}<br \/>void Judge()<br \/>{<br \/>if(S[P[0]]&lt;=0)<br \/>cout&lt;&lt;-1&lt;&lt;endl,exit(0);<br \/>for(int i=1;i&lt;n;i++)<br \/>if(S[P[i]]==S[P[i-1]])<br \/>cout&lt;&lt;-1&lt;&lt;endl,exit(0);<br \/>}<br \/>void init()<br \/>{<br \/>scanf(&quot;%d&quot;,&amp;n);<br \/>scanf(&quot;%d&quot;,S);P[0]=0;<br \/>for(int i=1;i&lt;n;i++)<br \/>{<br \/>scanf(&quot;%d&quot;,S+i);<br \/>S[i]+=S[i-1];<br \/>P[i]=i;<br \/>}<br \/>sort(P,P+n,cmp);<br \/>Judge();<br \/>}<br \/>void solve()<br \/>{<br \/>bool mark[maxn]={0};int ans=n;<br \/>for(int i=0;i&lt;n;i++) if(!mark[i])<br \/>{<br \/>int t=i;<br \/>while(!mark[t])<br \/>mark[t]=true,t=P[t];<br \/>ans&#8211;;<br \/>}<br \/>cout&lt;&lt;ans&lt;&lt;endl;<br \/>}<br \/>int main()<br \/>{<br \/>init();<br \/>solve();<br \/>}<\/p>\n","protected":false},"excerpt":{"rendered":"<p>http:\/\/www.spoj.pl\/problems\/MUSIC\/USACO\u4e0d\u77e5\u90a3\u5e74\u90a3\u6708\u7684\u6708\u8d5b\u9898\u3002\u3002\u3002\u770b\u4e0a\u53bb\u5f88BT\u3002\u3002\u4f46\u5982\u679c\u770b\u4e00\u4e0b\u90e8\u5206\u548c\u7684\u8bdd\u3002\u3002\u4f1a\u53d1\u73b0\u641e\u90a3\u4e48\u591a\u4e5f\u5c31\u662f\u4ea4\u6362Sx-1\u4e8eSy\u3002\u3002\u8981\u8ba9\u6761\u4ef6\u6ee1\u8db3\u3002\u3002\u5fc5\u987b\u8981\u628a\u90e8\u5206\u548c\u987a\u5e8f\u6392\u5e8f\u3002\u3002\u5e76\u4e14S1&gt;0\u4ee5\u53ca\u6ca1\u6709\u76f8\u540c\u7684\u90e8\u5206\u548c\u3002\u3002\u90a3\u4e48\u6700\u5c0f\u4ea4\u6362\u6570\u5c31\u662fn-\u8f6e\u6362\u6570\u3002\u3002\u5f88\u597d\u6c42\u3002\u3002Code\u3002\u3002\u3002#include&lt;cstdio&gt;#include&lt;cstdlib&gt;#include&lt;iostream&gt;#include&lt;algorithm&gt;const int maxn=100000;using namespace std;int S[maxn],P[maxn],n;bool cmp(const int&amp;x,const int&amp;y){return S[x]&lt;S[y];}void Judge(){if(S[P[0]]&lt;=0)cout&lt;&lt;-1&lt;&lt;endl,exit(0);for(int i=1;i&lt;n;i++)if(S[P[i]]==S[P[i-1]])cout&lt;&lt;-1&lt;&lt;endl,exit(0);}void init(){scanf(&quot;%d&quot;,&amp;n);scanf(&quot;%d&quot;,S);P[0]=0;for(int i=1;i&lt;n;i++){scanf(&quot;%d&quot;,S+i);S[i]+=S[i-1];P[i]=i;}sort(P,P+n,cmp);Judge();}void solve(){bool mark[maxn]={0};int ans=n;for(int i=0;i&lt;n;i++) if(!mark[i]){int t=i;while(!mark[t])mark[t]=true,t=P[t];ans&#8211;;}cout&lt;&lt;ans&lt;&lt;endl;}int main(){init();solve();}<\/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\/23"}],"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=23"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/23\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=23"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=23"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=23"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}