{"id":579,"date":"2019-01-31T00:14:23","date_gmt":"2019-01-30T16:14:23","guid":{"rendered":"http:\/\/SmokeyDays.top\/wordpress\/?p=579"},"modified":"2019-01-31T00:14:23","modified_gmt":"2019-01-30T16:14:23","slug":"lp2153-sdoi2009-%e6%99%a8%e8%b7%91","status":"publish","type":"post","link":"http:\/\/SmokeyDays.top\/wordpress\/2019\/01\/31\/lp2153-sdoi2009-%e6%99%a8%e8%b7%91\/","title":{"rendered":"lp2153 SDOI2009 \u6668\u8dd1"},"content":{"rendered":"\n<p>\u9898\u610f\u7b80\u8ff0\uff1a\u6c42\u4e00\u5f20\u56fe\u4e0a\u4e0d\u5171\u70b9\u4e24\u70b9\u95f4\u6700\u5927\u8def\u5f84\u6570\u3002 <br>\n\u9996\u5148\u8003\u8651\u4e0d\u5171\u8fb9\u6700\u5927\u8def\u5f84\u6570\uff0c\u5f88\u5bb9\u6613\u53ef\u4ee5\u60f3\u5230\u5927\u529b\u4e0a\u4e00\u4e2a\u6700\u5927\u6d41\uff0c\u8fb9\u6d41\u91cf\u4e3a\u4e00\u3002<br>\n\u7136\u540e\u8003\u8651\u4e0d\u5171\u70b9\u6700\u5927\u8def\u5f84\u6570\u3002\u6211\u4eec\u53d1\u73b0\uff0c\u53ef\u4ee5\u901a\u8fc7\u62c6\u70b9\u6765\u6784\u6210\u7ea6\u675f\u6761\u4ef6\u3002\u5177\u4f53\u6765\u8bf4\u5c31\u662f\u5c06\u6bcf\u4e2a\u70b9\u62c6\u6210\u5165\u70b9\u548c\u51fa\u70b9\uff0c\u7136\u540e\u8dd1\u4e00\u4e2a\u7f51\u7edc\u6d41\u3002<br>\n\u73b0\u5728\u8fd8\u8981\u6c42\u4e00\u4e2a\u6700\u77ed\u603b\u8def\u5f84\u957f\u5ea6\uff0c\u5f88\u5bb9\u6613\u53ef\u4ee5\u60f3\u5230\u8d39\u7528\u6d41\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u5c31\u5c06\u6bcf\u4e00\u6761\u8fb9\u7684\u8d39\u7528\u8bbe\u7f6e\u4e3a\u5b83\u7684\u957f\u5ea6\u3002\u7136\u540e\u8dd1\u4e00\u904d\u5373\u53ef\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include&lt;iostream>\n#include&lt;cstdio>\n#include&lt;queue>\n\nconst int INF=0x3f3f3f3f;\n\ninline int Min(int A,int B){\n\treturn A&lt;B?A:B;\n}\n\nstruct ee{\n\tint v;\n\tint w;\n\tint c;\n\tint nxt;\n}e[100005];\nint h[405],et=-1;\ninline void Eadd(int U,int V,int W,int C){\n\te[++et]=(ee){V,W,C,h[U]};\n\th[U]=et;\n}\ninline void add(int U,int V,int W,int C){\n\tEadd(U,V,W,C);\n\tEadd(V,U,0,-C);\n}\n\nint n,m,s,t,dis[405],val[405],fa[405],nw[405];\nbool vis[405];\nstd::queue&lt;int> q;\ninline int spfa(){\n\tfor(int i=1;i&lt;=t;++i){\n\t\tvis[i]=0,dis[i]=INF,val[i]=INF;\n\t}\n\tvis[s]=1,dis[s]=0,fa[t]=-1;\n\tq.push(s);\n\tint p;\n\twhile(!q.empty()){\n\t\tp=q.front();\n\t\tq.pop();\n\t\tvis[p]=0;\n\t\tfor(int i=h[p];i>=0;i=e[i].nxt){\n\t\t\tif(e[i].w>0&amp;&amp;dis[e[i].v]>dis[p]+e[i].c){\n\t\t\t\tdis[e[i].v]=dis[p]+e[i].c;\n\t\t\t\tfa[e[i].v]=p;\n\t\t\t\tnw[e[i].v]=i;\n\t\t\t\tval[e[i].v]=Min(val[p],e[i].w);\n\t\t\t\tif(!vis[e[i].v]){\n\t\t\t\t\tvis[e[i].v]=1;\n\t\t\t\t\tq.push(e[i].v);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\treturn fa[t]!=-1;\n}\n\nvoid init(){\n\tscanf(\"%d%d\",&amp;n,&amp;m);\n\ts=1,t=2*n;\n\tfor(int i=1;i&lt;=t;++i){\n\t\th[i]=-1;\n\t}\n\tint u,v,c;\n\tfor(int i=1;i&lt;=m;++i){\n\t\tscanf(\"%d%d%d\",&amp;u,&amp;v,&amp;c);\n\t\tadd(n+u,v,1,c);\n\t}\n\tfor(int i=2;i&lt;n;++i){\n\t\tadd(i,n+i,1,0);\n\t}\n\tadd(1,n+1,1926,0);\n\tadd(n,2*n,1926,0);\n\tint ansW=0,ansC=0,p;\n\twhile(spfa()){\n\t\tp=t;\n\t\tansW+=val[t];\n\t\tansC+=val[t]*dis[t];\n\t\twhile(p!=s){\n\t\t\te[nw[p]].w-=val[t];\n\t\t\te[nw[p]^1].w+=val[t];\n\t\t\tp=fa[p];\n\t\t}\n\t}\n\tprintf(\"%d %d\\n\",ansW,ansC);\n}\n\nint main(){\n\tinit();\n\treturn 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u610f\u7b80\u8ff0\uff1a\u6c42\u4e00\u5f20\u56fe\u4e0a\u4e0d\u5171\u70b9\u4e24\u70b9\u95f4\u6700\u5927\u8def\u5f84\u6570\u3002 \u9996\u5148\u8003\u8651\u4e0d\u5171\u8fb9\u6700\u5927\u8def\u5f84\u6570\uff0c\u5f88\u5bb9\u6613\u53ef\u4ee5\u60f3\u5230\u5927\u529b\u4e0a\u4e00\u4e2a\u6700\u5927\u6d41\uff0c\u8fb9\u6d41\u91cf &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/SmokeyDays.top\/wordpress\/2019\/01\/31\/lp2153-sdoi2009-%e6%99%a8%e8%b7%91\/\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb<span class=\"screen-reader-text\">\u201clp2153 SDOI2009 \u6668\u8dd1\u201d<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[30,32,9,6,75,80,5],"tags":[],"_links":{"self":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/579"}],"collection":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/comments?post=579"}],"version-history":[{"count":1,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/579\/revisions"}],"predecessor-version":[{"id":580,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/posts\/579\/revisions\/580"}],"wp:attachment":[{"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/media?parent=579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/categories?post=579"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/SmokeyDays.top\/wordpress\/wp-json\/wp\/v2\/tags?post=579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}