{"id":876,"date":"2019-06-14T16:26:47","date_gmt":"2019-06-14T08:26:47","guid":{"rendered":"http:\/\/SmokeyDays.top\/wordpress\/?p=876"},"modified":"2019-06-14T16:26:47","modified_gmt":"2019-06-14T08:26:47","slug":"lp5290-%e5%8d%81%e4%ba%8c%e7%9c%81%e8%81%94%e8%80%832019-%e6%98%a5%e8%8a%82%e5%8d%81%e4%ba%8c%e5%93%8d","status":"publish","type":"post","link":"http:\/\/SmokeyDays.top\/wordpress\/2019\/06\/14\/lp5290-%e5%8d%81%e4%ba%8c%e7%9c%81%e8%81%94%e8%80%832019-%e6%98%a5%e8%8a%82%e5%8d%81%e4%ba%8c%e5%93%8d\/","title":{"rendered":"lp5290 \u5341\u4e8c\u7701\u8054\u80032019 \u6625\u8282\u5341\u4e8c\u54cd"},"content":{"rendered":"\n

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#include<iostream>\n#include<cstdio>\n#include<queue>\n\ntypedef long long ll;\nconst int N=200005;\ninline void Swap(int &A,int &B){\n\tA^=B^=A^=B;\n}\ninline int Max(int A,int B){\n\treturn A>B?A:B;\n}\nstruct ee{\n\tint v;\n\tint nxt;\n}e[N<<1];\nint h[N],et=0;\ninline void add(int U,int V){\n\te[++et]=(ee){V,h[U]};\n\th[U]=et;\n}\nint fa[N],n;\nll ans=0;\nint val[N],id[N],st[N],tp=0;\nstd::priority_queue<int> q[N];\ninline void uni(int X,int Y){\n\tif(q[id[X]].size()<q[id[Y]].size()){\n\t\tSwap(id[X],id[Y]);\n\t}\n\twhile(!q[id[Y]].empty()){\n\t\tst[++tp]=Max(q[id[X]].top(),q[id[Y]].top());\n\t\tq[id[X]].pop(),q[id[Y]].pop();\n\t}\n\twhile(tp){\n\t\tq[id[X]].push(st[tp--]);\n\t} \n}\ninline void dfs(int X){\n\tfor(int i=h[X];i;i=e[i].nxt){\n\t\tdfs(e[i].v);\n\t\tuni(X,e[i].v);\n\t}\n\tq[id[X]].push(val[X]);\n}\nvoid init(){\n\tscanf(\"%d\",&n);\n\tfor(int i=1;i<=n;++i){\n\t\tscanf(\"%d\",&val[i]);\n\t\tid[i]=i;\n\t}\n\tfor(int i=2;i<=n;++i){\n\t\tscanf(\"%d\",&fa[i]);\n\t\tadd(fa[i],i);\n\t}\n\tdfs(1);\n\twhile(!q[id[1]].empty()){\n\t\tans+=q[id[1]].top();\n\t\tq[id[1]].pop();\n\t}\n\tprintf(\"%lld\\n\",ans);\n}\n\nint main(){\n\tinit();\n\treturn 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
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