delete pics to save space

7.3345.cpp

@@ -0,0 +1,60 @@
+#include<cstdio>
+#include<cstring>
+#include<iostream>
+#include<algorithm>
+#include<map>
+#include<sstream>
+#include<vector>
+using namespace std;
+const int maxn=205;
+const int oo=0x3f3f3f3f;
+map<string,int> mp;
+int n,m,id,w[maxn],fa[maxn],sum[maxn],f[maxn][maxn];
+inline int ID(const string &s)
+{
+	if(mp.find(s)==mp.end()) mp[s]=++id;
+	return mp[s];
+}
+vector<int> G[maxn];
+void dfs(int u)
+{
+	sum[u]=1;
+	for(int i=0;i<G[u].size();i++) { dfs(G[u][i]); sum[u]+=sum[G[u][i]]; }
+	f[u][0]=0;
+	for(int i=0;i<G[u].size();i++)
+	{
+		int v=G[u][i];
+		for(int j=sum[u];j>=0;j--)
+			for(int k=0;k<=sum[v]&&k<=j;k++)
+				f[u][j]=min(f[u][j],f[u][j-k]+f[v][k]);
+	}
+	f[u][sum[u]]=min(f[u][sum[u]],w[u]);
+}
+int main()
+{
+	#ifdef local
+	freopen("pro.in","r",stdin);
+	#endif
+	w[0]=oo;
+	while(cin>>n>>m)
+	{
+		id=0; mp.clear(); memset(fa,0,sizeof(fa)); memset(f,0x3f,sizeof(f)); memset(sum,0,sizeof(sum));
+		for(int i=0;i<=n;i++) G[i].clear();
+		string tmp; getline(cin,tmp);
+		for(int i=1;i<=n;i++)
+		{
+			string s; getline(cin,s);
+			stringstream ss(s);
+			ss>>s;
+			int u=ID(s);
+			ss>>w[u];
+			while(ss>>s) fa[ID(s)]=u;
+		}
+		for(int i=1;i<=n;i++) G[fa[i]].push_back(i);
+		dfs(0);
+		int res=oo;
+		for(int i=m;i<=n;i++) res=min(res,f[0][i]);
+		printf("%d\n",res);
+	}
+	return 0;
+}