价[雅礼集训 2017 Day8]

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#pragma GCC optimize("O2")
#include<bits/stdc++.h>
#define eho(x) for(int& i=hed[x];~i;i=net[i])
#define Eho(x) for(int i=head[x];~i;i=net[i])
#define sight(c) ('0'<=c&&c<='9')
#define INF (1<<27)
inline void read(int &x){
    static char c;static int b;
    for (b=1,c=getchar();!sight(c);c=getchar())if(c=='-')b=-1;
    for (x=0;sight(c);c=getchar())x=x*10+c-48;
    x*=b;
}
using namespace std;
#define N 707
#define M 927007
int n,a[N][N],ni[N],t,x,ans;
bool usd[N];
struct G{
    int head[N],net[M],fall[M],cost[M],s,t,tot,d[N],hed[N];
    bool in[N];
    queue<int> Q;
    G() { memset(head,-1,sizeof head);tot=-1;}
    inline void add(int x,int y,int c){
        fall[++tot]=y; net[tot]=head[x]; head[x]=tot; cost[tot]=c;
    }
    inline void adds(int x,int y,int c){
        add(x,y,c); add(y,x,0);}
    inline bool spfa(){
        memset(d,127,sizeof d); int x;
        d[s]=1; Q.push(s); in[s]=1;
        while (!Q.empty()) {
            x=Q.front(); Q.pop();
            Eho(x)
                if (cost[i]&&d[fall[i]]>d[x]+1) {
                    d[fall[i]]=d[x]+1;
                    if (!in[fall[i]]) {in[fall[i]]=1,Q.push(fall[i]);}
                }
            in[x]=0;
        }
       return d[t]<INF;
    }
    inline int dfs(int x,int F){
        if (x==t|| !F) return F;
        int flow=0,r;
        eho(x)
         if (d[x]+1==d[fall[i]]&&((r=dfs(fall[i],min(F,cost[i])))>0)) {
          cost[i]-=r;
          cost[i^1]+=r;
          F-=r; flow+=r; if (!F) break;}
        return flow;    
    }
    int dinic(int A,int B){
        s=A; t=B;
        int flow=0;
        while (spfa()) {
         memcpy(hed,head,sizeof head);
         flow+=dfs(s,INF); }
        return flow;
    }
}G;
void write(int x) {if (x<10) {putchar('0'+x);return;} write(x/10); putchar('0'+x%10);}
inline void writeln(int x) {if (x<0) putchar('-'),x*=-1; write(x); putchar('
');}
bool find(int x) {
    for (int i=1;i<=n;i++)
     if (a[x][i]&&!usd[i]) {
        usd[i]=1;
        if (!ni[i]||find(ni[i])) 
         return ni[i]=x,1;
     } return 0;
}
int main () {
//freopen("c.in","r",stdin);
    read(n);
    for (int i=1;i<=n;i++) {
        read(t); while (t--) read(x),a[i][x]=1,G.adds(i,n+x,INF);   
    }
    for (int i=1;i<=n;i++) memset(usd,0,sizeof usd), 
    find(i);
    for (int i=1;i<=n;i++) {
        read(x);
        if (x<0) ans+=x,G.adds(0,i,-x);
        else G.adds(i,2*n+3,x);
        G.adds(n+i,ni[i],INF);
    }
    writeln(ans+G.dinic(0,2*n+3)); return 0;
}